Across
- 5. carries blood away from the heart.
- 6. smallest basic unit of structure.
- 8. lower chamber of the heart.
- 9. a bunch of tissues that help carry out a specific function.
- 13. organs working together.
- 14. upper chamber of the heart.
- 15. filters waste from the blood.
Down
- 1. where most absorption of food takes place.
- 2. stores urine.
- 3. large muscular sac.
- 4. allows air to pass to and from the lungs.
- 7. allows us to breathe.
- 10. group of similar cells working together.
- 11. filter that blood goes through.
- 12. where digestion begins.