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  1. Electrical conduction in the heart controlled by pacemaker cells in the sinoatrial node.
  2. Human heart, artwork
  3. Cardiovascular system, historical artwork
  4. Heart and Brain
  5. Heart attack, artwork
  6. Cross-section of human heart. cardiovascular system
  7. Human body showing heart and main circulatory system position
  8. Red blood cells and molecules, artwork
  9. Heart anatomy, 19th Century illustration
  10. Heart anatomy, 18th century
  11. Pulmonary veins and arteries. circulation, cardiovascular system
  12. Human foot anatomy showing skin, veins, arteries, muscles and bones
  13. Anatomy diagram showing crucial veins in human head and neck
  14. Blood cells in blood vessel, artwork
  15. Anatomy of human body and circulatory system, front view
  16. Veins and nerves of the neck. cardiovascular system, nervous system
  17. Cardiovascular system, artwork
  18. Human heart, artwork
  19. Anatomy of human circulatory system
  20. Heart anatomy, 19th Century illustration
  21. Structure of a human heart, artwork
  22. Superficial arteries and veins of face and scalp. cardiovascular system
  23. Coronary artery disease
  24. Arterial embolism
  25. Internal view of the human heart
  26. Arterial supply and venous drainage of the organs.
  27. Circulatory system and brain, artwork
  28. Circulatory system and brain, artwork
  29. Veins of the posterior abdominal wall. cardiovascular system
  30. Arteries of the posterior abdominal wall. cardiovascular system
  31. Heart anatomy, 19th Century illustration
  32. Blood clot, SEM
  33. Microscopic view of blood clotting inside the artery
  34. Human upper body showing bones, lungs and circulatory system
  35. Heart disease, artwork
  36. The arteries of the brain
  37. Transverse section of an artery. cardiovascular system, circulatory system
  38. Artwork showing a cut-away of a human arteriole
  39. Illustration of coronary artery atherosclerosis
  40. Artwork of the respiratory system of an asthmatic
  41. Artwork of cerebral embolism, cause of stroke
  42. Artwork of lung oedema in heart failure
  43. The arteries of the brain
  44. Microscopic view of white blood cells inside blood vessel
  45. Blood vessel anatomy
  46. Blood vessel
  47. Cross section of human heart
  48. Human head with bone, muscles and circulatory system