The cardiovascular System

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Across
  1. 4. when blood vessels narrow
  2. 6. pressure of blood on walls of vessels
  3. 8. white blood cells fight this
  4. 9. performance enhancing drug taken to lower heart rate
  5. 11. recreational drug that can raise blood pressure
  6. 12. time taken for heart rate to get back to resting after exercise
  7. 13. carries oxygen around the body
  8. 14. also know as blood doping helps increase number of red blood cells in body
  9. 15. when blood vessels widen and expand
  10. 16. number of times heart beats per minute
Down
  1. 1. pressure of blood as it goes away from heart
  2. 2. structure that carries blood
  3. 3. pressure of blood when heart relaxes and fills with blood
  4. 5. amount of blood pumped out of heart per minute
  5. 7. pumps blood around the body
  6. 10. amount of blood pumped out of the heart per beat