Circulatory system

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Across
  1. 2. breathe in
  2. 4. the main/ biggest artery leaving your heart
  3. 5. Blood vessels are veins and _____
  4. 7. breathe out
  5. 10. the heart has ____ chambers
  6. 11. cellular ___ the process where energy is released from glucose
  7. 12. largest vein in the body
  8. 14. oxygen breathed in is exchanged for co2 here
  9. 15. carries blood to the heart
Down
  1. 1. after coming in our mouth or nose, air goes down the ___
  2. 3. the smallest type of blood vessel
  3. 6. this makes up more than half of the blood volume
  4. 8. the bottom chambers of the heart
  5. 9. is red in colour and is found in red blood cells
  6. 13. the colour we show deoxygenated blood