Across
- 3. the study of life
- 5. what part of the brain controls respiration
- 7. Which chamber recives deoxygenated blood first
- 9. what are the lower chambers known as
- 11. what part of the body fight infection
- 13. which part of the heart sends out oxygenated blood
Down
- 1. this vessel carries blood to the heart
- 2. ______ valve
- 4. what separates the left and right chambers of the heart
- 6. where does gas exchange happen
- 8. When organ systems work together to perform a function what is the result
- 10. what are the upper chambers known as?
- 12. extra calories in our diet are stored as ___