Across
- 1. amount of air exhaled after a maximal inspiration
- 3. volume of air that can be inspired above tidal volume
- 8. muscle that relaxes during expiration and contracts during inspiration
- 10. Amount of air remaining in the lungs after a forced exhalation
- 11. breathing in due to decreased pressure in the lungs
- 12. A blood vessel that carries blood back to the heart.
- 14. tiny sacs of lung tissue specialized for gas exchange
Down
- 2. upper chambers of the heart
- 4. breathing out due to the decreased volume of the thorax
- 5. lower chambers of the heart
- 6. Amount of air that moves in and out of the lungs during a normal breath
- 7. prevent back flow in the heart
- 9. A blood vessel that carries blood away from the heart
- 13. largest artery in the heart, brings blood to all body parts