| A | B |
|---|
| organism | a living thing |
| organ | a part of an organism that has a specific function (job), e.g. heart, lung |
| function | what something does; a specific job that is carried out |
| cell | the smallest building block of living things |
| organ system | 2 or more organs working together to do a specific job |
| tissue | a group of the same type of cells working together for a specific function (job) |
| cell theory | “All living things are made of cells.” |
| microscope | an instrument that has a lens and is used for looking at very small organisms |
| specimen | a piece of plant or animal that is viewed under a microscope |
| unicellular* | made up of only 1 cell |
| multicellular* | made up of many cells working together |
| vestigial organ* | an organ that has become small and lost its use supposedly because of evolutionary change |
| compound microscope* | a microscope with 2 different lenses |
