| A | B |
|---|
| cells come in | a variety of sizes |
| The shape of a cell | can also tell you something about the job it does. |
| A one celled organism | has to perform all its life functions by itself |
| Cells in a many celled organism | do not work alone. |
| Tissues are | groups of similar cells that do the same sort of work. |
| The cells in a tissue | look alike |
| Different tissues are further organized into | organs |
| An organ is | a structure made up of different types of tissues that work together to do a particular job. |
| An organ system is | a group of organs working together to do a certain job. |
| Multicellular | is having many cells. |
