| Axial skeleton | bones that lie around the longitudinal axis (ctr) of body; regions |
| appendicular skeleton | U & L extremities and bones of the girdles |
| axial | bones down the ctr of the skeleton |
| appendicular | bones at the outside of the skeleton; girdles and their limbs (extremities) |
| skull | rests on the first cervical ; 22 bones total : divided into 2 divisions: cranium and facial bones |
| cranium | bones that surround and protect the brain 11 bones |
| facial bones | 14 bones |
| regions of the axial skeleton | 3: skull and assoc bones 29, vertebral column 26, thoracic cage 25 total 80 bones |
| regions of the appendicular skeleton | 4: pectoral girdles 4, pelvic girdles 2, upper limbs 60, and lower limbs 60 total 126 bones |
| girdle | suppport extremities 2 parts: pectoral and pelvic |
| pectoral | "chest" composed of clavicle and scapula |
| upper extremity | from humerus down |
| pelvic | "hip" composed of 3 fused bones- iliac, ishium, and pubic bones |
| lower extremity | from femur down |
| cranial bones | frontal , parietal, temporal, occipital, ethmiod , and sphednoid |