Respiratory and Excretory

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Across
  1. 3. Two passages that direct air into the lungs
  2. 4. The process of removing wastes
  3. 7. The main organ of the respiratory system
  4. 9. The system that brings air containing oxygen into your blood and takes carbon dioxide out
Down
  1. 1. A small filtering structure in the kidneys that filers waste
  2. 2. The condition the body is kept in internally no matter outside conditions
  3. 5. Two bean shaped organs that filter blood and regulate the amount of blood in your body
  4. 6. Tiny thin walled sacs of lung tissue where gases can move between air and blood
  5. 8. The exchange of gases in and outside of the body
  6. 10. Windpipe