Across
- 4. A body part made of tissues, like the heart or stomach.
- 8. (2 words) a special type of system that moves oxygen from the air or nutrients from food into the cells in the body.
- 9. An organism made of many cells, like humans.
- 10. Body parts that contract and relax to help you move.
- 11. Materials your body does not need, like carbon dioxide or food leftovers.
Down
- 1. The gas you breathe in that your cells need to stay alive.
- 2. Any living thing, such as a person, plant, or animal.
- 3. To keep something alive or going; what body systems do to keep you living.
- 5. A group of cells working together to do the same job.
- 6. Useful parts of food that give your body energy and help it grow.
- 7. The smallest unit of life; your body is made of millions of them.