human heart

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Across
  1. 2. Structure that regulates blood flow within the heart chambers.
  2. 6. Number of heartbeats per minute, also known as pulse rate.
  3. 7. Double-layered sac that surrounds the heart and protects it.
  4. 8. artery Carries deoxygenated blood from the heart to the lungs.
  5. 9. artery Blood vessel that supplies oxygen-rich blood to the heart muscle.
  6. 10. Lower chamber of the heart that pumps blood to the lungs or body.
  7. 11. Largest artery in the body, originating from the left ventricle.
  8. 13. cycle Sequence of events in one complete heartbeat.
Down
  1. 1. Medical term for high blood pressure.
  2. 3. Recording of the electrical activity of the heart
  3. 4. valve Valve between the left atrium and left ventricle.
  4. 5. vein Carries oxygenated blood from the lungs to the heart.
  5. 12. Upper chamber of the heart that receives blood from the veins.