| A | B |
|---|
| skeletal system | The frame of bones that supuports the body |
| over 200 | The number of bones in the body. |
| bones | Organs of the skeletal system. |
| marrow | The soft tissue inside bones. |
| function of the skeletal system | Gives the body shape,protects movement,supports. |
| cartilage | The strong, elastic tissue--covers ends of bones for easy movement |
| backbone | A long row of connected bones in the middle of the back. |
| vertebrae | The bones of the backbone. |
| pelvis | Wide bones at the end of the backbone. |
| joint | The place where two or more bones come together. |
| Five kinds of joints | Sliding, ball-and -socket,pivot, hinge, fixed |
| sliding joint | Joint that allows small sliding movements--backbone. |
| ball-and-socket joint | allows the most movement--upper leg |
| pivot joint | Allows movement from side to side--head |
| hinge joint | allows movement back and forth--elbow |
| fixed joint | No movement--skull |
| ligament | Connect bone to bone. |
| muscles | Organs of the muscular system. |
| over 600 in the body | The number of muscles in the body. |
| 3 kinds of muscle tissue | Skeletal, smooth, cardiac |
| skeletal muscle | The muscle that is attached to the bones |
| voluntary muscles | muscles that you control |
| involuntary muscles | Muscles that you do not control. |
| smooth muscle | Makes up the walls of organs of the body--stomach,blood vessels, esophogus |
| cardiac muscle | the heart--an involuntary muscle |
| tendon | Connects the muscle to bone. |
| fracture | A crack or break in a bone. |
| sprain | Stretched or torn ligament. |
| strain | an over stretched or torn muscle or tendon. |
| cramp | A sudden strong & painful muscle contraction. |
