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  1. Electrical conduction in the heart controlled by pacemaker cells in the sinoatrial node.
  2. Red blood cells and molecules, artwork
  3. Coronary artery disease
  4. Anatomy of human circulatory system
  5. Human head with bone, muscles and circulatory system
  6. Microscopic view of blood clotting inside the artery
  7. Schematic of the hypothalamus receiving nerve impulses from the body
  8. Artwork of the respiratory system of an asthmatic
  9. Heart disease, artwork
  10. Artwork of cerebral embolism, cause of stroke
  11. Cross section of human heart
  12. Heart with coronary vessels, artwork
  13. Microscopic view of white blood cells inside blood vessel
  14. Build-up of atherosclerotic plaque in an artery
  15. Thrombosed Blood Vessel, Artwork
  16. Cut artery, artwork