chapter 11 Cardiovascular system

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Across
  1. 4. Inner lining of the heart.
  2. 5. Pacemaker of the heart.
  3. 7. Contraction phase of the heartbeat.
  4. 8. Relaxation phase of the heartbeat.
  5. 11. Flow of blood from the heart to the lungs and back to the heart.
  6. 12. Instrument for measuring blood pressure.
  7. 13. Muscular middle layer of the heart.
  8. 14. Beat of the heart as felt through the walls of the arteries.
  9. 15. Heart rhythm originating in the sinoatrial node with a rate in patients at rest of 60 to 100 beats per minute.
  10. 16. Blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle.
Down
  1. 1. Blood that is oxygen-poor.
  2. 2. Innermost lining of blood vessels.
  3. 3. Largest artery in the body.
  4. 6. Record of the electrical activity of the heart.
  5. 9. One of two lower chambers of the heart.
  6. 10. Located between the right atrium and the right ventricle; it has three (tri-) leaflets, or cusps.