Skeletal Systems 1 Flashcards
Where is the Cranial Cavity?
Top of the skull
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What is the Calvaria?
Top of the skull
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What does the Cranial base consist of?
The floor of the Cranial Cavity
Anterior cranial fossa
Middle cranial fossa
Posterior cranial fossa
(depression)
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Orbits are?
Eye sockets
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What is the nasal cavity?
3-D spaces
Opening of the nose
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What is the bony nasal septum?
Ridge in the middle of the cavity (divides the nose)
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Piriform aperture
2-D opening
Piriform- “pear-shaped”
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What is the hard palate?
Inferior, bottom of the skull (roof of the mouth)
Constructed from parts of the maxilla and palatine bone
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What is the Zygomatic arch?
Cheek of bone
Constructed from parts of the zygomatic and temporal bones
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What is the infratemporal fossa?
depression on the side of the hard palate
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What is the Coronal suture?
Crown of the skull
Structure
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What is lambdoidal?
Back of the skull
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What is the sagittal suture?
Middle of skull
The line between two bones
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What is the squamous suture?
Separates temporal/parietal bones
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What is the supraorbital margin?
The upper half of the orbits
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Feature
What is the Parietal bone?
2 sections of the skull on most superior side of the skull
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What is the External Occipital protuberance bone?
Bump on the skull
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What are the occipital condyles?
Occipital Bone
Feature
Bottom of the skull
Anterior to the foramen magnum
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What are Nuchal lines?
Occipital Bone
Feature
Back of the neck
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What is the mastoid process?
Temporal Bone
Projection
ledge pointing straight down (breast-shaped)
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What is the styloid process?
Temporal Bone
Thin-pocky stick
Projection
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What is the Zygomatic process?
Temporal Bone
Projection
Horizontal line, crease
What is the Petrous portion?
Temporal Bone
Structure
Ridges, inside, back ridge
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What is the mandibular fossa?
Temporal Bone
Connects jaw
Depression
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What is the crista, Galli?
Ethmoid Bone
Structure
Cockscomb
Ridge inside the head on top of the bone
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What is the Cribriform of the Ethmoid bone?
Structure
Little holes
Tiny holes are for the olfactory nerves
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What is the perpendicular Ethmoid plate of the ethmoid bone?
The inside nose on top of nasal cavity
Structure
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What is the orbital of the ethmoid bone?
Structure
smooth plates which form the medial walls of the eye sockets
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What are the superior and medial concahe?
Ethmoid Bone
Project into the nasal cavities
Superior (outer)
Middle (inner)
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What is the greater wing of the Sphenoid bone?
In the middle cranial fossa and orbit
Top wings
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What is the lesser wing?
Sphenoid bone (structure)
In the anterior cranial fossa
Little wings, under
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What is the sella turcica?
Sphenoid bone
Square in middle
The pituitary gland rests here
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What are the Pterygoid Processes?
Projections
legs of the butterfly
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What are the medial and lateral plates?
Sphenoid bone
Structures
Lateral - outer walls
Medial - inner walls
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What is the body of the mandible?
The single bone that makes up the lower jaw
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What are dental alveoli?
Tooth sockets
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What is the angle of the mandible?
Jawline
Where the ramus meets the body of the mandible on the outside border
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What is the Ramus of the mandible?
Upward side, flat
Feature
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What is the Coronoid Process?
The more anterior structure at the top of the jaw
Projection
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What is the condylar process?
The more posterior structure at the top of the jaw
Head of the mandible or condylar process
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What is the body of the maxilla?
Superior to the teeth and contains the maxillary sinus
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What is the infraorbital margin?
Maxillae
The lower rim of the orbit
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What is the palatine process?
Maxillae
Structure
Bottom of the skull
Forms the anterior portion of the hard palate (roof) of the mouth
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What is the temporal process?
Projection
Zygomatic Bones (Cheekbones)
Arch of bone extending posteriorly from the zygomatic bone
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What is the nasal bone?
Part of a broken nose
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What is the horizontal plate?
Palatine bone
Structure
Forms posterior part of the hard palate
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What is the perpendicular plate?
Palatine bone
Lateral wall of the nasal cavity (outer wall)
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What is the opening for the nasolacrimal duct?
2-D space
Brings tears to your eyes
Medial opening for tear ducts
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What is the Vomer?
Tip of the bony nasal septum
Structure
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Mental foramen
Holes on the Chin or mandible
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Optic canal
Most anterior holes in the skull
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Superior orbital fissure
Superior holes inside the eye socket (Upper part of the boomerang shape)
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Inferior orbital fissure
Inferior holes inside of the eye socket
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External acoustic meatus
Hole of the ear canal
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Cribriform foramina
Tiny holes in the cribriform plate
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Foramen rotundum
anterior holes in the middle of the cranial fossa
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Foramen ovale
Oval-shaped holes in the middle cranial fossa
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Foramen spinosum
The smaller hole next to the foramen ovale
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Foramen lacerum
Larger holes with jagged edges
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Internal acoustic meatus
Ear canal, medial part of temporal bone
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Jugular foramen
directly behind the internal acoustic meatus
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hypoglossal canal
closets opening to the foramen magnum
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Foramen magnum
Large opening in the middle of the skull
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Opening of the carotid canal
The area around the carotid canal
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Carotid Canal
Opens up into the cranial cavity via the foramen lacerum
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Stylomastoid foramen
The hole located directly underneath the styloid process
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Incisive fossa
Behind the incisor teeth (bottom skull)
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Greater Palatine
Near the upper molar teeth (by the hard palate)
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Mandibular foramen
Internal surface of the mandible
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Paranasal sinuses
The name for air sinuses in the skull that connect to the nasal cavities via small openings and are lined by mucous membranes
Frontal Sinuses
Located in the frontal bone above the eyebrows
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Maxillary Sinuses
The largest of the sinuses!
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Ethmoid air cells
The space in the eye sockets next to the ethmoid bone
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Mastoid fontanelle
Where the squamous and lambdoidal junction meet
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Sphenoid fontanelle
Where the squamous and coronal junction meet
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Anterior fontanelle
Where the coronal and sagittal junction meet
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Posterior fontanelle
Where the sagittal and lambdoidal junction meet
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Cervical Vertebrae
C1-C7 (Neck)
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Thoracic Vertebrae
T1-T12 (articulate with ribs)
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Lumbar vertebrae
L1-L5 (lower back)
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Sacrum
5 fused vertebrae at the base of the spine
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Coccyx
Tailbone
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Primary curvatures
These curvatures of the spine are present at birth
Secondary curvatures
These curvatures of the spine develop postnatally
Thoracic kyphosis
The curvature in the spine located in the mid-back region - is also a primary curvature
Sacral kyphosis
The curvature in the spine located in the lower back region - is also a primary curvature
Cervical lordosis
The curvature in the spine located in the upper back (neck area) - is also a secondary curvature
Lumbar lordosis
The curvature in the spine located in the lower back region - is also a secondary curvature
Vertebral canal
The space where the spinal cord passes through
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Intervertebral foramen
The space between vertebrae where spinal nerves emerge from spinal cord (formed by the superior and inferior notches)
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Body of vertebra
Solid flat surface of the vertebra
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Vertebral Arch
Surrounds the vertebral foramen
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Laminae of the vertebral arch
The roof of the vertebral arch
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Pedicles of the vertebral arch
The wall of the vertebral arch
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Spinous process
Single projection arising from the posterior aspect of the vertebral arch (nose of the giraffe)
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Transverse processes
Two lateral projections from the vertebral arch (ears of the giraffe)
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Superior articular processes
The facets for articulation with the vertebra above
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Inferior articular processes
The facets for articulation with the vertebra below
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Superior and inferior notches
Together these form the intervertebral foramen
Cervical Vertebrae
These vertebrae are known to have small bodies
Bifid spinous process
on cervical vertebrae C3-C5. Forked.
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Transverse foramina
Allows for passage of the vertebral arteries
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Atlas
The C1 vertebra that has no body
Superior articular surface
These articulate with the occipital condyles and are located on the atlas (C1) vertebrae
Inferior articular surface
Articulate with the axis, and are more pea shaped
Anterior and posterior arches of the atlas
These are the arches found on either side of the atlas
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Axis
This is the C2 vertebrae
Dens of the axis
This is what the atlas sits upon and pivots on
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Vertebra prominens
C7. This is the first spinous process that you can feel at the back of your neck
Facets of the thoracic vertebrae
These are smooth surfaces where bones connect (specifically ribs)
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Anterior Sacral foramina
openings on the anterior side of the sacrum
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Posterior sacral foramina
openings on the posterior side of the sacrum
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Sacral promontory
Ridge on the anterior side of the sacrum
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Sacral Canal
Opening on the top of the sacrum
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Sacral hiatus
inferior opening of the sacral canal
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Sternum
Chestbone
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Xiphoid process of the sternum
The small portion on the bottom of the sternum
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Suprasternal notch (jugular)
Hollow U-shaped depression just above the sternum, in between the clavicles
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Sternal angle
Horizontal ridge across front of sternum
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Costa
rib
True ribs
ribs 1-7, attach directly to sternum
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False ribs
Ribs 8-12 do not directly attach to the sternum. Some connect to other costal cartilages while others do not connect to the sternum at all.
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Floating ribs
Ribs 11-12, do not attach to the sternum
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Head of the rib
Articulates with the costal facet of a thoracic vertebral body.
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The neck of the rib
Between head and tubercle of the rib
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Body of the rib
The main part of the rib
Tubercle of the rib
Attaches to facets of transverse processes
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Angle of the rib
The weakest part of the rob that is most susceptible to fracture
The costal groove of the rib
The dark depression on the inside of the rib that protects vessels and nerves
Costal cartilages of the rib
Made of hyaline cartilage, and connects the ribs to the sternum
Superior thoracic aperture
The top opening of the rib cage
Inferior thoracic aperture
The bottom opening of the rib cage
Thoracic cavity
This space contains heart and lungs
Intercostal space
The space between ribs
Costal margins
The “M” shape in the front of the ribs at the bottom.
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The hyoid bone
The U-shaped bone in the neck supports the tongue.
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Greater and lesser horns of the hyoid bone
This structure of the hyoid bone is for the tongue and neck muscle attachments
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Top of the skull
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Where is the Cranial Cavity?
Top of the skull
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What is the Calvaria?
The floor of the Cranial Cavity
Anterior cranial fossa
Middle cranial fossa
Posterior cranial fossa
(depression)
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What does the Cranial base consist of?
Eye sockets
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Orbits are?
3-D spaces
Opening of the nose
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What is the nasal cavity?
Ridge in the middle of the cavity (divides the nose)
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What is the bony nasal septum?
2-D opening
Piriform- “pear-shaped”
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Piriform aperture
Inferior, bottom of the skull (roof of the mouth)
Constructed from parts of the maxilla and palatine bone
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What is the hard palate?
Cheek of bone
Constructed from parts of the zygomatic and temporal bones
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What is the Zygomatic arch?
depression on the side of the hard palate
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What is the infratemporal fossa?
Crown of the skull
Structure
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What is the Coronal suture?
Back of the skull
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What is lambdoidal?
Middle of skull
The line between two bones
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What is the sagittal suture?
Separates temporal/parietal bones
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What is the squamous suture?
The upper half of the orbits
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Feature
What is the supraorbital margin?
2 sections of the skull on most superior side of the skull
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What is the Parietal bone?
Bump on the skull
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What is the External Occipital protuberance bone?
Occipital Bone
Feature
Bottom of the skull
Anterior to the foramen magnum
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What are the occipital condyles?
Occipital Bone
Feature
Back of the neck
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What are Nuchal lines?
Temporal Bone
Projection
ledge pointing straight down (breast-shaped)
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What is the mastoid process?
Temporal Bone
Thin-pocky stick
Projection
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What is the styloid process?
Temporal Bone
Projection
Horizontal line, crease
What is the Zygomatic process?
Temporal Bone
Structure
Ridges, inside, back ridge
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What is the Petrous portion?
Temporal Bone
Connects jaw
Depression
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What is the mandibular fossa?
Ethmoid Bone
Structure
Cockscomb
Ridge inside the head on top of the bone
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What is the crista, Galli?
Structure
Little holes
Tiny holes are for the olfactory nerves
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What is the Cribriform of the Ethmoid bone?
The inside nose on top of nasal cavity
Structure
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What is the perpendicular Ethmoid plate of the ethmoid bone?
Structure
smooth plates which form the medial walls of the eye sockets
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What is the orbital of the ethmoid bone?
Ethmoid Bone
Project into the nasal cavities
Superior (outer)
Middle (inner)
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What are the superior and medial concahe?
In the middle cranial fossa and orbit
Top wings
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What is the greater wing of the Sphenoid bone?
Sphenoid bone (structure)
In the anterior cranial fossa
Little wings, under
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What is the lesser wing?
Sphenoid bone
Square in middle
The pituitary gland rests here
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What is the sella turcica?
Projections
legs of the butterfly
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What are the Pterygoid Processes?
Sphenoid bone
Structures
Lateral - outer walls
Medial - inner walls
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What are the medial and lateral plates?
The single bone that makes up the lower jaw
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What is the body of the mandible?
Tooth sockets
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What are dental alveoli?
Jawline
Where the ramus meets the body of the mandible on the outside border
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What is the angle of the mandible?
Upward side, flat
Feature
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What is the Ramus of the mandible?
The more anterior structure at the top of the jaw
Projection
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What is the Coronoid Process?
The more posterior structure at the top of the jaw
Head of the mandible or condylar process
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What is the condylar process?
Superior to the teeth and contains the maxillary sinus
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What is the body of the maxilla?
Maxillae
The lower rim of the orbit
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What is the infraorbital margin?
Maxillae
Structure
Bottom of the skull
Forms the anterior portion of the hard palate (roof) of the mouth
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What is the palatine process?
Projection
Zygomatic Bones (Cheekbones)
Arch of bone extending posteriorly from the zygomatic bone
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What is the temporal process?
Part of a broken nose
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What is the nasal bone?
Palatine bone
Structure
Forms posterior part of the hard palate
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What is the horizontal plate?
Palatine bone
Lateral wall of the nasal cavity (outer wall)
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What is the perpendicular plate?
2-D space
Brings tears to your eyes
Medial opening for tear ducts
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What is the opening for the nasolacrimal duct?
Tip of the bony nasal septum
Structure
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What is the Vomer?
Holes on the Chin or mandible
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Mental foramen
Most anterior holes in the skull
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Optic canal
Superior holes inside the eye socket (Upper part of the boomerang shape)
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Superior orbital fissure
Inferior holes inside of the eye socket
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Inferior orbital fissure
Hole of the ear canal
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External acoustic meatus
Tiny holes in the cribriform plate
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Cribriform foramina
anterior holes in the middle of the cranial fossa
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Foramen rotundum
Oval-shaped holes in the middle cranial fossa
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Foramen ovale
The smaller hole next to the foramen ovale
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Foramen spinosum
Larger holes with jagged edges
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Foramen lacerum
Ear canal, medial part of temporal bone
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Internal acoustic meatus
directly behind the internal acoustic meatus
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Jugular foramen
closets opening to the foramen magnum
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hypoglossal canal
Large opening in the middle of the skull
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Foramen magnum
The area around the carotid canal
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Opening of the carotid canal
Opens up into the cranial cavity via the foramen lacerum
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Carotid Canal
The hole located directly underneath the styloid process
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Stylomastoid foramen
Behind the incisor teeth (bottom skull)
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Incisive fossa
Near the upper molar teeth (by the hard palate)
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Greater Palatine
Internal surface of the mandible
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Mandibular foramen
The name for air sinuses in the skull that connect to the nasal cavities via small openings and are lined by mucous membranes
Paranasal sinuses
Located in the frontal bone above the eyebrows
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Frontal Sinuses
The largest of the sinuses!
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Maxillary Sinuses
The space in the eye sockets next to the ethmoid bone
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Ethmoid air cells
Where the squamous and lambdoidal junction meet
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Mastoid fontanelle
Where the squamous and coronal junction meet
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Sphenoid fontanelle
Where the coronal and sagittal junction meet
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Anterior fontanelle
Where the sagittal and lambdoidal junction meet
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Posterior fontanelle
C1-C7 (Neck)
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Cervical Vertebrae
T1-T12 (articulate with ribs)
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Thoracic Vertebrae
L1-L5 (lower back)
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Lumbar vertebrae
5 fused vertebrae at the base of the spine
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Sacrum
Tailbone
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Coccyx
These curvatures of the spine are present at birth
Primary curvatures
These curvatures of the spine develop postnatally
Secondary curvatures
The curvature in the spine located in the mid-back region - is also a primary curvature
Thoracic kyphosis
The curvature in the spine located in the lower back region - is also a primary curvature
Sacral kyphosis
The curvature in the spine located in the upper back (neck area) - is also a secondary curvature
Cervical lordosis
The curvature in the spine located in the lower back region - is also a secondary curvature
Lumbar lordosis
The space where the spinal cord passes through
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Vertebral canal
The space between vertebrae where spinal nerves emerge from spinal cord (formed by the superior and inferior notches)
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Intervertebral foramen
Solid flat surface of the vertebra
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Body of vertebra
Surrounds the vertebral foramen
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Vertebral Arch
The roof of the vertebral arch
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Laminae of the vertebral arch
The wall of the vertebral arch
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Pedicles of the vertebral arch
Single projection arising from the posterior aspect of the vertebral arch (nose of the giraffe)
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Spinous process
Two lateral projections from the vertebral arch (ears of the giraffe)
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Transverse processes
The facets for articulation with the vertebra above
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Superior articular processes
The facets for articulation with the vertebra below
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Inferior articular processes
Together these form the intervertebral foramen
Superior and inferior notches
These vertebrae are known to have small bodies
Cervical Vertebrae
on cervical vertebrae C3-C5. Forked.
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Bifid spinous process
Allows for passage of the vertebral arteries
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Transverse foramina
The C1 vertebra that has no body
Atlas
These articulate with the occipital condyles and are located on the atlas (C1) vertebrae
Superior articular surface
Articulate with the axis, and are more pea shaped
Inferior articular surface
These are the arches found on either side of the atlas
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Anterior and posterior arches of the atlas
This is the C2 vertebrae
Axis
This is what the atlas sits upon and pivots on
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Dens of the axis
C7. This is the first spinous process that you can feel at the back of your neck
Vertebra prominens
These are smooth surfaces where bones connect (specifically ribs)
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Facets of the thoracic vertebrae
openings on the anterior side of the sacrum
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Anterior Sacral foramina
openings on the posterior side of the sacrum
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Posterior sacral foramina
Ridge on the anterior side of the sacrum
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Sacral promontory
Opening on the top of the sacrum
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Sacral Canal
inferior opening of the sacral canal
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Sacral hiatus
Chestbone
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Sternum
The small portion on the bottom of the sternum
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Xiphoid process of the sternum
Hollow U-shaped depression just above the sternum, in between the clavicles
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Suprasternal notch (jugular)
Horizontal ridge across front of sternum
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Sternal angle
rib
Costa
ribs 1-7, attach directly to sternum
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True ribs
Ribs 8-12 do not directly attach to the sternum. Some connect to other costal cartilages while others do not connect to the sternum at all.
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False ribs
Ribs 11-12, do not attach to the sternum
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Floating ribs
Articulates with the costal facet of a thoracic vertebral body.
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Head of the rib
Between head and tubercle of the rib
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The neck of the rib
The main part of the rib
Body of the rib
Attaches to facets of transverse processes
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Tubercle of the rib
The weakest part of the rob that is most susceptible to fracture
Angle of the rib
The dark depression on the inside of the rib that protects vessels and nerves
The costal groove of the rib
Made of hyaline cartilage, and connects the ribs to the sternum
Costal cartilages of the rib
The top opening of the rib cage
Superior thoracic aperture
The bottom opening of the rib cage
Inferior thoracic aperture
This space contains heart and lungs
Thoracic cavity
The space between ribs
Intercostal space
The “M” shape in the front of the ribs at the bottom.
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Costal margins
The U-shaped bone in the neck supports the tongue.
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The hyoid bone
This structure of the hyoid bone is for the tongue and neck muscle attachments
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Greater and lesser horns of the hyoid bone