CV and Respiratory system
Across
- 3. muscle that allows the lungs to expand and relax
- 5. carry blood away from the heart
- 9. when the heart relaxes and fills with blood
- 10. air volume left in the lungs
- 13. bottom chamber in the heart
- 14. carry deoxygenated blood
Down
- 1. where gaseous exchange happens at the muscle tissue
- 2. two tubes in the airway that lead to the lungs
- 4. protein in red blood cells
- 6. air volume taking in a breath
- 7. air sacs where gaseous exchange happens
- 8. largest blood vessel in the body
- 11. when the heart contracts and pumps blood out
- 12. top chamber in the heart