| A | B |
|---|
| tissue | a group of cells that work together |
| organ | a group of tissues that work together |
| organ (body) system | a group of organs that work together |
| cell | the smallest part of the body |
| digestion | changing food into a form cells can use |
| mouth | the place where food enters and digestion begins |
| esophagus | the tube that carries food from the mouth to the stomach |
| stomach | baglike organ made of muscles |
| small intestines | an organ shaped like a long tube that absorbs nutrients |
| large intestines | an organ shaped like a wide tube which removes water |
