| A | B |
|---|
| cardiac muscle | involuntary muscle of the heart |
| smooth muscle | involuntary muscle of the digestive system |
| skeletal muscle | voluntary muscle attached to bones |
| ligament | strong fiber that attaches bones to bones |
| tendon | attaches bones to muscles |
| periosteum | thin membrane on the outside of bones |
| marrow | inside of bone where red blood cells are produced |
| compact bone | gives your bones strenghth |
| spongy bone | gives your bones flexibility |
| cramp | sudden contraction of a muscle |
| strain | overstretching a muscle or tendon |
| sprain | streatching or tearing a ligament |
| fracture | crack or break in a bone |
| compound fracture | broken end of a bone pokes through the skin |
| fixed joint | allows no movement |
| pivot joint | allows side to side movement |
| hinge joint | allows back and forth movement |
| ball & socket joint | allows all movement in a circle |
| skeleton | supports and protects your body |
| cartilage | soft, bone-like material |
| gliding joint | allows movement by sliding bones over bones |
| involuntary muscle | automatic, you do not control |
| voluntary muscle | you choose to move these |
| joint | place where two bones meet |
