Across
- 1. An organ that exchanges oxygen and carbon dioxide with the blood
- 3. The basic unit of structure and function in living things
- 4. where digestion begins
- 5. The passages that direct air into the lungs
- 7. A group of similar cells that perform the same function.
- 9. lower chamber of the heart
- 10. Liquid part of blood
- 12. stores urine
- 14. A muscular tube that connects the mouth to the stomach.
Down
- 1. absorbs water
- 2. Blood cells that carry oxygen from the lungs to the body cells.
- 6. Cell A blood cell that fights disease.
- 8. Allows air to pass to and from lungs (windpipe)
- 11. upper chamber of the heart
- 13. A blood vessel that carries blood back to the heart