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  1. Electrical conduction in the heart controlled by pacemaker cells in the sinoatrial node.
  2. Artwork of ear, nose
  3. Anatomy of male testis
  4. Multiphoton fluorescence image of HeLa cells
  5. Heart of Steel
  6. Bismuth crystal
  7. Slipped disc
  8. Scanning electron micrograph of Staphylococcus and a dead human neutrophil
  9. Illustration of syringe needle drawing blood lipid
  10. Female hormone
  11. Medical illustration of human leg muscles, four side views
  12. Medical equipment on a tray
  13. Bacterial Growth On Culture Media
  14. Pregnancy
  15. Vintage Advertisement For Renne's Pain Killing Magic Oil, With Decorative Border
  16. Teeth, cross section
  17. Red blood cells and molecules, artwork
  18. The Birth of Rostam by Caesarean. Shahnameh. The Book of Kings. 16th c. Persian Art
  19. Anatomy of human vertebra
  20. Stamp out Syphilis and Gonorrhea - WPA Poster
  21. Blood clot, SEM
  22. Facial nerves
  23. Blood spectra, 19th century artwork
  24. View of assorted dental equipment
  25. Arthritis of the neck, X-ray
  26. Embryo development
  27. Sickle cell anaemia
  28. Leonardo da Vinci's <Vitruvian Man> with Binary Digits
  29. Foxglove flowers
  30. Illustration of a whiplash injury to the neck
  31. Conceptual image of platelets with red blood cells
  32. Heart and lungs
  33. Stem cell, conceptual artwork
  34. Medical zodiac, 15th century diagram
  35. Blood types, conceptual image
  36. Shame may be Fatal - WPA Poster
  37. Conceptual image of DNA
  38. Cutting out the Stone of Madness or an Operation on the Head
  39. Artwork of effects of asthma inhaler on man's lung
  40. Artwork of Crohn's disease of the small intestine
  41. Retina in glaucoma, artwork
  42. Coronary artery disease
  43. E. coli bacteria, SEM
  44. Avian flu virus, TEM
  45. Illustration showing diverticulitis of the colon
  46. Physician and Patient
  47. Syphilis bacterium (Treponema pallidum)
  48. Alexander Fleming (1881-1955), British microbiologist