The Circulatory system

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Across
  1. 2. A buildup of fat, cholesterol, or calcium that can lead to a heart attack.
  2. 3. Blood coming back from the lungs enters the heart here. (two words)
  3. 4. These prevent blood from flowing the wrong way in veins.
  4. 8. The blood transports O2 and these to the body.
  5. 10. Blood vessels where gas exchange occurs.
  6. 12. This type of blood cell is used to fight infection.
  7. 15. The walls of veins are much _________ than the walls of arteries because veins do not needs to deal with as much pressure.
  8. 17. The largest portion of blood is this component.
  9. 19. A moving line that shows the electrical activity in the heart.
  10. 20. Component of blood that helps with clotting.
  11. 21. The type of blood found in the right side of the heart.
  12. 22. Thick walled blood vessels that can handle lots of pressure.
  13. 23. The type of muscle in the heart
Down
  1. 1. Pumps blood from the heart to the lungs. (two words)
  2. 5. A heart X-ray.
  3. 6. These blood vessels carry blood towards the heart.
  4. 7. The number of chambers in the heart.
  5. 9. This type of blood cell is used to carry gasses to and from the working tissues.
  6. 11. Most muscular chamber of the heart.
  7. 13. The arteries that bring nutrients and oxygen to the heart itself.
  8. 14. Tells you how fast your heart is beating in bpm.
  9. 16. The main pump of the circulatory system.
  10. 18. A lock of oxygen and nutrients that causes the heart tissue to die.