Across
- 2. The millions of tiny air sacs that the lungs are made up of
- 5. The activity of each part in an organism
- 6. The arrangement of parts in an organism or an object
- 7. A group of organs that work together to perform body functions
- 8. A structure made up of a collection of tissues that carries out a specialized function
- 9. A group of similar cells that perform a common function
Down
- 1. Organisms that are made up of just one cell that performs all of the functions necessary for life
- 3. A living thing that can carry out life processes by itself
- 4. Organisms made up of more than one cell