Across
- 2. something that is biological and living
- 5. the smallest organisms in the body
- 6. transports oxygen-poor blood to the heart
- 8. an organism with only one cell
- 11. the act of making more of a species
- 13. these are the smallest blood vessels in your body
- 14. these transport oxygen-rich blood to the body
- 15. your body has many of these, your heart being one of them
Down
- 1. the compression of molecules with less and more liquid
- 3. an organism with more than one cell
- 4. many parts of the body, such as muscles, are made of this
- 7. makes your cells work hard to eliminate
- 9. the healthy component in food items
- 10. spreading out across a large sur
- 12. grants you immunity to diseases