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  1. Nerve cell, computer artwork
  2. Nerve cell, computer artwork
  3. Nerve cell, artwork
  4. Nerve cell, artwork
  5. Neck and facial nerves
  6. Muscles of the side and back
  7. Muscles of the hand and forearm
  8. Muscles of the foot
  9. Muscles of the back
  10. Muscles of lower leg
  11. Mendelian inheritance
  12. Medieval urine wheel
  13. Medical zodiac, 15th century diagram
  14. Lung blood vessels
  15. Lung anatomy, artwork
  16. Lower leg bones and ligaments
  17. Legend of Archimedes and the lever
  18. Knee replacement, artwork
  19. Joint pain, conceptual artwork
  20. Johannes Kepler and Tycho Brahe
  21. Johann Gutenberg, German inventor
  22. Intestinal villi, artwork
  23. Interior of human blood vessel showing a thrombus
  24. Instruments for removing bladder stones
  25. Insect microscopy, 19th century
  26. Illustration showing diverticulitis of the colon
  27. Illustration of syringe needle drawing blood lipid
  28. Illustration of septal cirrhosis of the liver
  29. Illustration of coronary artery atherosclerosis
  30. Illustration of a whiplash injury to the neck
  31. Illustration of a calculus or stone in the kidney
  32. Human skull
  33. Human skull
  34. Human skeleton
  35. Human nervous system, artwork
  36. Human nervous system, artwork
  37. Human lungs, artwork
  38. Human heart, artwork
  39. HIV virus particles, artwork
  40. Hipparchus, Ancient Greek astronomer
  41. Henri Poincare, French mathematician
  42. Heart disease, artwork
  43. Heart and neck blood vessels
  44. Heart and lungs
  45. Heart after heart attack
  46. Heart
  47. Healthy teeth, artwork
  48. Healthy adult hand, X-ray