Axial Skeleton Flashcards
Define Bone Marking
it’s unique structural feature of the bone, that serves a specific functional role.
What are 3 functional roles of bone marking?
- Projections that are sites of muscle and ligament attachment
- Surfaces that form ligaments
- Depressions & openings for blood vessels and nerves
ID the bone marking
Tuberosity:
Large rounded projection; may be roughened
ID the bone marking
Crest:
Narrow ridge of bone; usually prominent
ID the bone marking
Trochanter:
Very Large, blunt, irregularly shaped process (femur)
What is a Tubercle?
Small rounded projection or process
ID
lesser Terbercle
ID the bone marking
Epicondyle:
Raised area on or above a condyle
What is a Process?
Any body prominence
What is a head?
large smooth projection-fit into another bone marking
ID the bone marking
Facet
Smooth, nearly flat articular (joint) surface
ID the bone marking
Condyle
rounded projection; typically fit into a bone marking on another bone in order to form a joint.
What is a Foramen?
“hole”
round oval opening through a bone
What is a Meatus? (Highlighted in green)
Canal
What is a Fossa?
Shallow, basin like depression in a bone, often serving as an articular surface.
ID the bone marking indicated by the pointer
Supraorbital margin
ID the bone indicated by the pointer
Parietal Bone
ID the bone marking indicated by the pointer
Occipital Condyles
ID the bone marking indicated by the pointer
Foramen Magnum
Where do you find the foramen magnum?
In the occipital bone
What’s the function of the foramen magnum?
It’s the point which the spinal cord enters into the cranial cavity
ID the bone marking
Mastoid process
What is the structure highlighted by red and it’s function?
sternocleidomastoid muscle
Function: Prime mover of the head
External acoustic meatus
Tuberosity
Id the bone marking
Iliac Crest
ID the process highlighted in red
Styloid process
Function of styloid process?
Forms a point of attachment for the muscles that allow you to swallow
ID the region highlighted in green
Petrous Region
Identify structure indicated by pointer 1
Jugular Foramen
ID the structure indicated by 3.
Petrous region
ID the structure indicated by 1
Epiphysis
What type of bone makes up the epiphysis?
Spongy bone connective tissue
What do you find in the nooks and crannies (epiphysis) of the spongy bone?
Red bone marrow
What is the functional role of red bone marrow?
To make red blood cells, white blood cells, and platelets.
ID the structure indicated by 3
Diaphysis
ID the structure indicated by 12
Medullary Cavity
ID the structure indicated by 12
Medullary Cavity
What is the medullary cavity filled with?
Yellow bone marrow
ID the structure indicated by the pointer
Articular cartilage
ID the structure by the pointer
Nutrient foramen
ID the structure indicated by 2
Concentric lamellae
ID the structure indicated by 5
Osteon
ID the structure indicated by 3; what it’s functional role?
Lacunae
Function: houses osteocytes
ID the structure indicated by 10
Circumferential lamellae
ID the structure indicated by 9
Periosteum
ID the tissue
Compact bone connective tissue
ID the tissue
Compact bone connective tissue
ID the tissue
Spongy bone
How many bones are in the Axial Skeleton?
80 bones
How many bones are in the skull?
22 bones
How many bones are classified as Cranial bones?
8 Bones
ID the suture
coronal suture
ID the suture
squamous suture
ID the suture
Lambdoid
What makes up the cranium?
parietal, temporal, frontal, occipital, sphenoid, ethmoid
How many bones make up the facial?
14 bones
ID the fossa
Anterior cranial fossa
ID the fossa
Middle cranial fossa
ID the fossa
Posterior cranial fossa
What does the jugular foraman do?
It allows the jugular vein to exit the brain, and drain blood.
ID the structure
Carotid foramen/canal
ID the bone indicated by the pointer
Ethmoid bone
ID the bone highlighted in yellow
Sphenoid
ID the bone marking by the marking
Sella Turcica
ID the bone marking
Optic foramen/canal
ID the bone marking
crista galli
ID bone marking by the pointer
Olfactory foramen
ID the bone marking highlighted in green
Perpendicular plate
ID the structure indicated by the pointer
Middle Nasal Concha
ID the region indicated by 2
interanal Acoustic Meatus