| A | B |
|---|
| skeletal system | made up of bones and their associative tissues |
| cartilage | connective tissue |
| joints | places where two bones come together |
| immovable joints | fixed joints; no movement at the bone |
| movable joints | many bones are freely moveable joints |
| slightly moveable | joints that permit a small amount of movement |
| bone | living tissue; solid network of living cells and fibers that are supported by deposits of calcium salts |
| periosteum | tough membrane that surrounds the bone |
| Haversian canal | contain blood vessels and nerves |
| compact bone | beneath the layer of periosteum |
| spongy bone | beneath the compact bone; helps add strength to bone w/o adding mass |
| osteocytes | deposits or absorbs calcium salts |
| bone marrow | cavity that contains soft tissue; two types- yellow and red |
| ligament | tough connective tissue; attached to membranes that surround bones and hold them together |
| synovial fluid | bursae; reduces friction between the bone |
| muscular system | composed of muscle tissue that is highly specialized to contract when stimulated |
| skeletal muscle | muscle attached to bones; have many nuclei |
| smooth muscle | not under voluntary control; are not striated |
| cardiac muscle | only found in the heart; striated; not under voluntary control |
| myosin | thick filaments |
| actin | thin filaments |
| tendons | tough connective tissue that joins skeletal muscles to bones |
