| A | B |
|---|
| skeletal system | all the bones in the body |
| marrow | fatty, soft tissue in the center of long bones and in the spaces of spongy bones |
| periosteum | tough, tight-fitting membrane that covers the surface of bones |
| cartilage | thick, slippery tissue layer covering that ends of bones |
| joint | place wher two or more bones meet |
| ligament | tough band of tissue that holds bones together at joints |
| immovable joint | type of joint that allows little or no movement |
| movable joint | type of joint that allows a wide range of movement |
| muscle | organ that relaxes and contracts to allow movement of bones and body parts |
| voluntary muscle | muscles, such as face muscles, that can be consciously controlled |
| involuntary muscle | muscles, such as cardiac muscles, that can't be consciously controlled |
| skeletal muscle | striated, voluntary muscles that move bones |
| tendon | thick band of tissue that attaches muscle to bones |
| smooth muscle | nonstriated, involuntary muscles that move many internal organs |
| cardiac muscle | striated, involuntary muscle that is found only in the heart |
| epidermis | outer layer of the skin |
| melanin | pigment that gives skin its color |
| dermis | layer of tissue beneath the dermis; contains blood vessels, nerves, and oil / sweat glands |
