Across
- 2. go into your heart
- 3. the process of getting CO2 out of your body
- 6. connects nose to lungs
- 8. makes up 55% of your blood
- 9. carry oxygen to your cells
- 10. branches off of the bronchi
- 11. the chemical that makes your blood red
Down
- 1. muscle underneath the rib cage
- 2. takes oxygenated blood from lungs to the heart
- 4. the process of getting oxygen to your lungs
- 5. goes away from heart
- 7. control blood flow in the heart