Respiratory system

12345678910111213
Across
  1. 3. the study of life
  2. 5. what part of the brain controls respiration
  3. 7. Which chamber recives deoxygenated blood first
  4. 9. what are the lower chambers known as
  5. 11. what part of the body fight infection
  6. 13. which part of the heart sends out oxygenated blood
Down
  1. 1. this vessel carries blood to the heart
  2. 2. ______ valve
  3. 4. what separates the left and right chambers of the heart
  4. 6. where does gas exchange happen
  5. 8. When organ systems work together to perform a function what is the result
  6. 10. what are the upper chambers known as?
  7. 12. extra calories in our diet are stored as ___