| A | B |
|---|
| number of bones in human body | 206 |
| ligament | connective tissue that attaches bones to bones |
| tendon | connective tissue that attaches bones to muscles |
| cartilage | dense, fibrous flexible connective tissue that cushions & protects bones |
| where is cartilage found? | tip of nose, ears, between vertebrae, knees, ankles, elbow joints |
| joint | place where two bones come close together |
| pivot joint | allows a bone to rotate on a ring-shaped bone (neck) |
| ball and socket joint | allows circular motion (shoulder, hip) |
| hinge joint | allows forward & backward motion (elbow, knee) |
| skeletal muscle | muscle tissue attached to bones, moves skeleton (voluntary) |
| smooth muscle | muscle tissue responsible for involuntary movement |
| cardiac muscle | muscle tissue found only in heart (involuntary) |
| how muscles work together | one contracts, other relaxes |
| sprains | ligaments/tendons get torn/pulled beyond normal range |
| fractures | break in bone |
| dislocation | when a bone is forced out if its joint |
| muscle cramp | prolonged contraction of skeletal muscle where it tightens |
| muscular dystrophy | inherited disease; muscle cells break down, muscles weak, can't contract |
| tendonitis | swelling of tendon from sharp twist, pull of muscle |
| double-jointed | ligaments stretched so much/bones move in unusual positions |
