| A | B |
|---|
| ball-and-socket joint | A joint found in the shoulder and hip, where a knob fits into a socket. |
| cardiac muscle | A type of involuntary muscle found in the heart. |
| cartilage | A flexible, rubbery tissue found on the ends of bones, the ears, and the nose. |
| closed fracture | A bone break where the bone does not come through the skin. |
| compact bone | The dense, hard outer part of the bone. |
| cramp | What happens when muscles contract strongly and painfully. |
| fixed joint | A joint where two or more bones come together and allow no movement, such as the joints of the skull. |
| fracture | A break in the bone. |
| hinge joint | A joint which allows two bones to swing back and forth, like a door. |
| involuntary muscle | A type of muscle which is not controlled by the conscious mind. |
| joint | A place where two or more bones come together in the body. |
| ligament | Strong bands of tissue which hold bones together at the joint. |
| marrow | The soft tissue which is inside bones and helps make blood cells. |
| moderation | Not too much, not too little, just the right amount. |
| open fracture | A bone break in which the ends of the bones go through the skin. |
| organ | A group of tissues working together to do a job for the body. |
| organ system | A group of organs working together to do a job for the body. |
| periosteum | The tough outer covering or skin of the bones. |
| pivot joint | A joint which allows movement from side to side, such as the neck. |
| skeletal muscle | Muscle which is attached to bones and helps them move. |
| skeletal system | The organ system which is made up of bones. |
| sliding joint | A joint which allows small sliding movements, such as the joint between the vertebrae. |
| smooth muscle | A type of involuntary muscle which is found in the walls of the stomach. |
| spongy bone | The "honeycomb" or cancellous bone found at the ends of bones. |
| sprain | A pull or tear in a ligament. |
| strain | A pull or tear in a muscle. |
| stress fracture | A small crack in a bone cause by working the bone too hard. |
| tissue | A group of cells of similar type which work together. |
| vertebrae | The bones which make up the "backbone." |
| voluntary muscle | Any muscle which can be controlled by the voluntary mind. |
