| A | B |
|---|
| axial skeletion | includes the skull and the bones that support it, such as the vertebral column, the ribs, and the sternum |
| appendicular skeletion | includes the bones of the arms and legs and stuctures associated with them, such as the shoulder and hip bones, wrists, ankles, fingers, toes, and so on |
| joints | found where two or more bones meet |
| ligament | a tough of connective tissue that attaches one bone to another |
| bursa | fluid-filled sac located between the bones that absorb shock and keep bones from rubbing against each other |
| tendon | a thick band of connective tissue, attach muscles to bones |
| ball-and-socket joints | allows rotational movement, shoulder and hips |
| pivit joints | allows bones to twist around each other, elbow |
| hinge joints | allow back-and-forth movement, knees and fingers |
| gliding joints | allows bones to slide past each other, wrists and anklescompact bone |
| compact bone | layer of protective hard bone tissue surrounding every bone; composed of repeating units of osteon systems |
| osteocytes | newly formed bone cells |
| spongy bone | soft bone filled with many holes and spaces surrounded by a layer of more dense compact bone |
| osteoblasts | potential bone forming cells that secrete collagen in which minerals in the blood stream can be deposited |
| red marrow | marrow found in the humerous, femur, sternum, ribs, vertebrae, and pelvis that produce red blood cells |
| yellow marrow | marrow composed of stored fats found in many bones |
