Across
- 2. Large, flat muscle at the bottom of the chest cavity that helps with breathing
- 3. blood vessel that carries blood away from the heart.
- 4. tiny finger-shaped structures that cover the inner surface of the small intestine where digested food is absorbed
- 6. Allows air to pass to and from lungs (windpipe)
- 8. The passages that direct air into the lungs
- 10. blood cells that carry oxygen from the lungs to the body cells.
- 12. A group of similar cells that perform the same function.
- 13. tiny sacs of lung tissue specialized for the movement of gases between air and blood
- 14. Organ where most nutrient absorption takes place
Down
- 1. blood cell that fights disease.
- 5. large muscular sac that continues the mechanical and chemical digestion of food
- 7. A muscular tube that connects the mouth to the stomach.
- 9. Airways in the lungs that lead from the bronchi to the alveoli.
- 11. An organ that exchanges oxygen and carbon dioxide with the blood
- 13. upper chamber of the heart