skeletal system pt.2

what are the major organs/structures of the skeletal system

bone, joints, cartilage, ligaments

axial skeleton is composed of

bones of skull and face, vertebral column, rib cage, sternum

appendicular skeleton is composed of

pectoral girdle, pelvic girdle, limbs

red marrow function

makes red blood cells

yellow marrow function

stores fats and minerals

the most important minerals stored in bones

calcium and phosphorus salts

the blood vessels and nerves of an osteon are housed in

central/haversian canal

cervical vertebrae bones

7

thoracic vertebrae bones

12

Lumbar vertebrae bones

5

sacral/sacrum bones

5 fused together

coccygeal or coccyx bones

4 fused together

name and purpose of C1

atlas, head nodding and attaching skull to spine

name and purpose of C2

Axis, rotation of head side to side

true ribs

ribs 1-7, attached directly to the sternum by costal cartilage

false ribs

ribs 8-12, attached to a single cartilage attached to part of the sternum

floating ribs

ribs 11-12, not attached to sternum at all

fontanels

soft spot of baby’s skull covered by fibrocartilage, allows baby’s brain to grow and develop

3 bones in middle ear

anvil, malleus, stapes

ligaments

connect bone to bone

tendons

connect muscle to bone