Chapter 8 - Skeletal System Flashcards
Functions
- Support
- Protection
- Movement
- Mineral storage
- Hematopoisis
Support
Framework
Protection
Ribs (lungs and heart)
Skull (brain)
Vertebrae (spinal cords)
Movement
Muscles pull the bones
Mineral storage
Calcium is the most abundant
Hematopoiesis
- Red marrow - stem cells
* Platelets
Red marrow - stem cells
Convert to RBC or WBC
Platelets
Red marrow in spongy bone and marrow of long bone of childern
Classification
- Spongy bone
- Compact
- Growth
Spongy
Strong
Has little structures
“Holes” and angles in it
•Supports weight but doesn’t weigh a lot •Made of ~Trabecular ~Red marrow ~Lacunae and canal oculi openings
Trabecular
Bridges and strats
Spongy bone
~~Red marrow
Stem cells; make blood
Compact bone
strong bone openings
•Can remodel/head itself •Haversion system 〰Lamella 〰Osteocytes 〰Lacunae 〰Canaliculi 〰Haversion
Lamella
Ring of cells
Osteocytes
Bone cells
Lacunae
- Little lakes
- where osteocytes live
Canaliculi
Tiny canals that carry nutrients to lacunae
Haversion
- Central canal
- Carries blood vessels and nerves to lamella
Growth
-Inflamed by growth hormones and sex hormones
•over secretion ; gianlism
•under secretion ; dwarfism
(influenced some by genetics)
•injury - cause growth plates to fuse early ; stop
growth
Bone Shapes
- Short bones
- Long bones
- Flat bones
- Irregular bones
Short Bones
- Cube shaped
- Wrist and ankles
- Compact outer, spongy inner
Long Bones
-Arms, legs, fingers •epiphysis •diaphsis •Cartilage •Blood vessels •Marrow •Periosteum •Endometrium
Epiphysis
Ends of long bones
Diaphsis
Shaft of long bones
Cartilage
- Articular, joins the bones to another surface
- Hyline : protects from rubbing, wears bone down (prevents)
Blood Vessels
very vascular
Marrow
- Red Marrow
- Yellow marrow
Marrow
〰Red marrow
- Stems cells,
- makes RBC, WBC, and platelets
Yellow Marrow
fat
Peritoneum
Dense irregular tissue on the outside of bone
Endostrium
Lines the inside of the bone
(medulla cavity)
Flat
- Skull, sternum, scapulae, ribs
- Compact outer layer and spongy inner layer
Irregular
- Face, vertebrae, hip bones
- Compact outer and spongy inner
Regions, Names, and Markings
-Two main Regions •Axial •Appendicular -Markings •Bumps •Fossa •Foramen
Axial
Skull, vertebra, ribs, sternum
Bumps
-Structures where tendons attach
•Tuberosity/tubericle •Condyle
•Epiendyle •Trochanter
•Head •Facet
•Process •Spine
Tuberosity/tubericle
Knob-like projections that are smooth and round
Condyle
A large rounded knob that articulates with another bone
Epienyle
An enlargement near and above a condyle
Trochanter
Large tubercle or tuberosity found on the femur
Head
An large rounded endocbone
Facet
A small flattered surface
Process
A promirent projection
Spine
A sharp projection
Fossa
Shallow smooth flat surface for a fan shaped muscle to attach to depression or groove
Foramen
Hole, usually serve as passageway
Vertebral Column
- Cervical
- Thoracic
- Lumbar
- Sacrum
- Coccyx
Cervical
(7)
- Atlas C1
- Axis C2
Atlas
Holds up head, allows you to nod your head
Axis
Allows you to rotate your head
Thoracic
(12)
-Attach to rib
Lumbar
(5)
-Supports weight
Coccyx
Tail bone
Thoracic cage
- Sternum
- Rib Cage
Sternum
Protect heart ❤
•Manubrium
•Body
•Xyphoid process
Manubrium
Where clavicle attaches (sternum)
Body
Blade (sternum)
Xyphoid process
Tip of the sternum
Rib Cage
Protect lungs •True Ribs •False Ribs •Floating Ribs •Costal Cartilage •Intercostal space
True Ribs
Attach rib directly to sternum (7)
False Ribs
Attach rib to cartilage bridge (8-10)
Floating Ribs
Don’t attach rib to front (11-12)
Costal Cartilage
Connect ribs to sternum
Intercostal space
Space between ribs
Skull
- Cranium
- Facial Bones
Cranium
- Frontal
- Parietal
- Temporal
- Occipital
- Sphenoid
- Ethmoid
Frontal
Forehead
Parietal
(2)
-Upper sides
Temporal
(2) -Sides close to ears •Mastoid process •Zygomatic process •Styloid process •Auditory mealus
Auditory mealus
Ear opening
Occipital
Back
•Foreman magnum
•Condyles
Foreman Magnum
For spinal cord (occipital)
Condyles
- Bumps around foreman
- Sits on top C1
Sphenoid
Butterfly shape
Ethmoid
Between eye orbit and supports nasal cavity
Facial Bones
- Mandible
- Maxilla
- Zygomatic bones
Mandible
-Lower jaw
-Single bone
•TMJ
•Mental Foreman
TMJ
Temporal mandibular joint
Mental Foreman
Hole for blood vessels and nerves
Maxilla
- Upper jaw
- Connects in middle
- Forms palate
Zygomatic bones
- Cheek bone
- Form orbit of eye
Clavicle
Collarbone
•Most commonly broken bone
Scapula
Shoulder blade •Spinous process \ •Supra spinous fossa > Dorsal •Infraspinous fossa / •Caracoid process •Acromoin process •Glenoid cavity •Subscapular
Spinous process
Spine
Supra spinous fossa
Flat part above spine
Infraspinous fossa
Flat part below spine
Caracoi process
Points down
Acromoin process
- Curves around to front
- Articulates with clavicle
Glenoid cavity
Forms socket for humerus
Subscapular fossa
Underside of scapula “hidden”
(touches ribs)
Humerus
Funny bone •Head •Greater tuberosity •Lesser tuberosity •Intertuberele groove •Deltoid tuberosity •Radial groove •Medial and lateral epidondyles •Olecranon fossa
Humerus Head
Round balls at top
Greater tuberosity
Big bump (humerus)
Lesser tuberosity
Smaller bump (humerus)
Intertuberele groove
- Groove between tuberositie
- Where bicep tendon attaches
Deltoid tubersoity
Where deltoid muscle attaches
Radial groove
Radial nerve space back side of bone (humerus)
Olecranon fossa
Part where elbow bends
Ulna
Olecranon process
Olecranon process
Elbow
Radius
- Radial Head
- Radial tuberosity
- Styloid process of the radius
- Ulnar notch
Radial Head
Flat round top
-Rotates and connects thumb side
Radial Tuberosity
Bump by the radial head
Styloid process of the radius
- Pointy bottom
- Doesn’t connect to ulna
Ulnar Notch
Where the ulna attaches
Hand
- Carpals
- Metacarpals
- Phalanges
Carpals
Wrist (8)
Metacarpals
Palm (5)
Phalanges
Digits (14)
- Distal, middle, proximal
- Pollex
Pollex
Tip of the thumb
Pelvic Girdle
Gut bucket
-Coxal bone
Coxal Bone
Hip bone
- Ilium
- Pubis
- Ishium
- Acetabulum
- Sacrum
- Coccyx
Ilium
Wing top of hip bone
Pubis
Front lower portion
- come together at pubis symphysis
- Pubis symphysis
Ishium
Circle, points downward
- What you sit on
- 2 holes : orbturator foreman
Acetabulum
Socket for femur
Femur
Strongest bone ; weight bearing
- Head and neck
- Greater trochanter
- Lesser trochanter
- Gluteal tuberosity
- Medial and lateral condyles
- Intercondyle notch
- Linea aspeia
Greater Trochanter
“king” Top
Lesser Trochanter
“Queen” Below greater trochanter
Medial and Lateral condyles
Bottom bumps
Linea aspeia
Spiny ridge on back of femur
Tibia
Thick Inner Bone -Weight bearing •Tibral Plateau •Tibial Tuberosity •Anterior Crest •Medial malleolus •Lateral malleolus
Medial malleulos
Bottom, longer point
Lateral malleulos
Bottom, shorter point
-Connects to fibula
Fibula
Long skinny outer bone
- non-weight bearing
- Muscle attachment
- Lateral malleolas
lateral malleolas
Pointy side on bottom
Patella
kneecap
Foot
- Tarsals
- Metatarsals
- Phalanges
Tarsals
Ankle (7)
Metatarsals
Body of foot (5)
Phalanges
Digits/Toes