The Human Heart

123456789101112131415161718
Across
  1. 5. X-ray imaging of blood vessels with contrast
  2. 6. Membrane surrounding the heart
  3. 8. Narrowing of the mitral valve
  4. 10. Lower tip of the heart
  5. 11. Smallest type of blood vessel
  6. 13. Record of the electrical activity of the heart
  7. 15. Arteries on sides of neck branching from the aorta
  8. 16. Condition of rapid heartbeat
  9. 17. Relaxation phase of the heartbeat
  10. 18. Small vein
Down
  1. 1. Largest artery in the body
  2. 2. Rapid, irregular contractions of the heart
  3. 3. Largest vein in the body
  4. 4. Lower chamber of the heart
  5. 7. Inflammation of a vein
  6. 9. The heart beats in the embryo before it is supplied with _______
  7. 12. Small artery
  8. 14. Muscular middle layer of the heart