| A | B |
|---|
| cells | smallest living thing in body |
| tissues | groups of cells working to do same job |
| organs | groups of tissues working together |
| skeleton | the body's framework |
| joint | where two bones meet |
| ligament | tough bands that holds joints together |
| cartilage | tough tissue between bones |
| vertebrae | bones that make up spine |
| pelvis | hip bones |
| spinal cord | nerve superhighway through spine |
| marrow | soft tissue inside bone |
| voluntary | muscles that are moved purposely |
| involuntary | muscles that are on "autopilot" |
| straited | powerfull and easily tired muscles |
| smooth | make up most involuntary muscle |
| cardiac | muscle that makes up heart |
| tendons | connects muscle to bone |
| peristalsis | wavelike digestive movements |
| enzyme | substance that helps a chemical reaction |
| villi | fingerlike growths in small intestine |
