Cardiovascular System

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Across
  1. 3. a heart rate that is slower than 60 bpm
  2. 6. a rapid heart rate over 100 bpm
  3. 8. valve located between left ventricle and aorta
  4. 9. the main blood vessel leading from the heart to the rest of the body
Down
  1. 1. protective sac around the heart
  2. 2. heart contraction
  3. 4. heart relaxation
  4. 5. carries oxygen-depleted blood to the heart
  5. 7. carries oxygenated blood away from heart into body