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  1. Electrical conduction in the heart controlled by pacemaker cells in the sinoatrial node.
  2. Heart attack, artwork
  3. Human body showing heart and main circulatory system position
  4. Arteries of the brain, 3D CT scan
  5. Red blood cells and molecules, artwork
  6. Anatomy of human body and circulatory system, front view
  7. Rib cage and heart, 3D CT scan
  8. Human foot anatomy showing skin, veins, arteries, muscles and bones
  9. Heart anatomy, 18th century
  10. Coronary artery disease
  11. Circulatory system, 17th century
  12. Anatomy of human circulatory system
  13. Internal view of the human heart
  14. Human head with bone, muscles and circulatory system
  15. Microscopic view of blood clotting inside the artery
  16. Human upper body showing bones, lungs and circulatory system
  17. Schematic of the hypothalamus receiving nerve impulses from the body
  18. Artwork of the respiratory system of an asthmatic
  19. Illustration of coronary artery atherosclerosis
  20. Heart disease, artwork
  21. Artwork of cerebral embolism, cause of stroke
  22. Cross section of human heart
  23. Heart with coronary vessels, artwork
  24. Artwork of lung oedema in heart failure
  25. Anatomy of human nervous system and lymphatic system
  26. Heart and lung anatomy, 17th century
  27. Microscopic view of white blood cells inside blood vessel
  28. Build-up of atherosclerotic plaque in an artery
  29. Artwork of bronchodilator action in asthma
  30. Blood vessel anatomy
  31. Thrombosed Blood Vessel, Artwork
  32. Coronary Blood Clot, SEM
  33. Heart with arteries showing cholesterol in one and plaque in the other
  34. Cut artery, artwork
  35. Human anatomy, artwork