| A | B |
|---|
| organs | grouups of tissues that join together to do a specific job |
| specialized cells | cells that are similar in size and shape |
| tissues | group of similar cells that work together to perform a specific function |
| organ system | group of organs that work together |
| cartilage | tough, flexible connective tissue |
| ligaments | tissue that connects bone to bone |
| marrow | soft tissue in a bone that makes blood cells |
| cardiac muscle | type of muscle found only in the heart |
