| A | B |
|---|
| humerus | large bone in upper arm |
| radius | small bone in forearm, near thumb |
| ulna | small bone in forearm, near pinky |
| diaphisis | shaft of long bone |
| red marrow | located near end of long bone, makes red blood cells |
| yellow marron | stores fat cells |
| medullary cavity | hollow center of long bone |
| articular cartilage | on end of long bone, cushions joint |
| endosteum | lines medullary cavity |
| periosteum | hard outer surface of bone |
| 4 types of bone | long, flat, short, irregular |
| functions of skeleton | structure, storage, produces red blood cells, stores fat and minerals, helps with movement |
| Axial | skull, spine, rib cage, sternum |
| Appendicular | limbs and limb girdles |
| Foramina | holes in bone where blood vessels and nerves pass through |
| Sutures | where skull bones form together |
| cervical spine | 7 vertebrae at neck |
| thoracic spine | 12 vertebrae at chest |
| lumbar spine | 5 vertebrae at waist |
| Intervertebral disk | provide shock absorption & bending and twisting |
