| A | B |
|---|
| bone | The structure that makes up the body's skeleton. |
| ligament | Elasticy bands that connect one bone to another. |
| tendon | Tough cords that connect a muscle to a bone. |
| cartilage | Flexible, slippery material at the ends of bones that cushions bones and keeps them from grinding together. |
| marrow | Soft reddish center of a bone. Makes blood cells. |
| joint | The place where two bones meet. |
| skeletal muscle | Muscle tissue that is attached to bone and moves the skeleton. |
| smooth muscle | Muscle tissue responsible for involuntary movement. Found in the intestines, diaphragm, etc... |
| cardiac muscle | Muscle tissue found only in the heart. |
| sprain | Injury in which ligaments are torn or stretched. |
| 206 | The approximate number of bones in the skeletal system. |
| calcium | Mineral that makes up the nonliving parts of bones. |
| voluntary | Muscles you have direct control over. |
| involuntary | Muscles that work automatically. |
| Strain | An injury that happens if you overstretch a tendon. |
