Respiration System

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Across
  1. 2. the flow of blood from the heart to all parts of the body and back to the heart
  2. 4. taking in and giving out air
  3. 5. breathe in
  4. 9. the main air tube that connects the nose and the lungs
  5. 12. tiny blood vessels that allow substances to move into and out of blood
  6. 14. tube-like structures through which blood flows
  7. 16. blood vessels that carry blood rich in oxygen away from the heart
  8. 17. ____SYSTEM is the system that brings oxygen from the air to our blood so that it can be transported around the body
Down
  1. 1. the number of times our heart beats in one minute
  2. 3. _____SYSTEM is the system that transports substances around the body
  3. 6. tiny air sacs where the exchange of oxygen and carbon dioxide takes place
  4. 7. the number of times we breathe in and out in one min
  5. 8. the pair of organs that help in gas exchange
  6. 10. the organ that pumps blood around the body
  7. 11. the liquid in blood vessels that transports substances around the body
  8. 13. breathe out
  9. 15. blood vessels that carry blood poor in oxygen towards the heart