The circulatory system

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Across
  1. 3. ___________ is when your heart grows bigger and stronger.
  2. 5. ______________ is a liquid called plasma, with red cells, white cells and platelets.
  3. 7. Pumps blood around your body through blood vessels.
  4. 9. ___________ has thick muscles and elastic fibers to cope with the pressure the blood has when pumping blood out of the heart.
  5. 13. __________ are tubes that carry blood around the body.
  6. 14. The three different types of blood vessels are arteries, veins, and _____________.
  7. 17. the ___________ is the biggest artery.
  8. 20. _____________ is your heart rate at rest. Answer seventy
  9. 21. _________ cells defend against diseases.
Down
  1. 1. The ____________ is the biggest vein.
  2. 2. How many chambers does the heart have?
  3. 4. The walls of the heart are made up of ___________
  4. 6. The blood carries food and __________ to your body cells and gets rid of carbon dioxide.
  5. 8. _________ volume is the blood pumped out of the heart by each ventricle during one contraction.
  6. 10. ________ cells carries oxygen and has haemoglobin.
  7. 11. The heart is divided down the middle by the _______________ .
  8. 12. _______________ Circulation is the right side pumps blood to the lungs and then returns to the heart.
  9. 15. ___________ Circulation is when the left side pumps blood into the body and returns to the heart.
  10. 16. _________ prevents backflow of blood.
  11. 18. ____________pumps blood towards the heart.
  12. 19. ___________ is the number of times your heart beats per minute. Answer heart rate