Across
- 2. element found in blood
- 4. number of chambers in the heart
- 5. first trophic level
- 8. animal that ears meat only
- 11. type of animals on the 2nd trophic level
- 13. controls the activities of a cell
Down
- 1. largest bone in human body
- 3. number of trophic levels
- 6. animal that ears plants and animals
- 7. location of smallest bone in human body
- 9. has green pigment in plant cells
- 10. carries blood away from the heart
- 12. carries blood to the heart