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  1. Electrical conduction in the heart controlled by pacemaker cells in the sinoatrial node.
  2. Cross-section of human heart. cardiovascular system
  3. Human anatomy ,artwork
  4. Red blood cells and molecules, artwork
  5. Human blood cells, SEM
  6. Human heart, artwork
  7. Blood cells in blood vessel, artwork
  8. Coronary artery disease
  9. Blood clot, SEM
  10. Anatomy of human circulatory system
  11. Structure of a human heart, artwork
  12. Human head with bone, muscles and circulatory system
  13. Heart valve and strings, SEM
  14. Circulatory system and brain, artwork
  15. Circulatory system and brain, artwork
  16. Microscopic view of blood clotting inside the artery
  17. Schematic of the hypothalamus receiving nerve impulses from the body
  18. Trabeculae carneae in the heart, SEM
  19. The arteries of the brain
  20. Artwork of the respiratory system of an asthmatic
  21. Artwork of cerebral embolism, cause of stroke
  22. Heart disease, artwork
  23. Cross section of human heart
  24. Heart with coronary vessels, artwork
  25. The arteries of the brain
  26. Microscopic view of white blood cells inside blood vessel
  27. Build-up of atherosclerotic plaque in an artery
  28. Thrombosed Blood Vessel, Artwork
  29. Cut artery, artwork