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  1. Scanning electron micrograph of a human T cell
  2. Typical Animal Cell and Plant Cell
  3. Glial cells, confocal light micrograph
  4. Volvox colony, light micrograph
  5. Multiphoton fluorescence image of HeLa cells
  6. Mitochondria, TEM
  7. Scanning electron micrograph of a human neutrophil ingesting MRSA
  8. Laboratory vessels on drying rack
  9. Cell
  10. Cell
  11. Lung cells, fluorescent micrograph
  12. Scanning electron micrograph of Staphylococcus and a dead human neutrophil
  13. Stem cells, artwork
  14. Conceptual image of mitosis
  15. Conceptual image of neuron
  16. Bracken rhizome, light micrograph
  17. Embryo development 24-36 hours after fertilization
  18. Cardiac muscle, TEM
  19. Scanning electron micrograph of HIV particles infecting a human H9 T cell
  20. Human anatomy showing deep muscles in the neck and upper back
  21. Plant cell
  22. Castor oil stem, light micrograph
  23. Cardiac muscle and capillary, TEM
  24. Cell
  25. Microscopic view of human B-cells
  26. Conceptual image of neuron
  27. Confused Flour Beetle Adult, SEM
  28. Mitochondrion, TEM
  29. Escher's Blue Butterfly
  30. Cell
  31. Cannabinoid receptor binding, artwork
  32. Colon blood vessels, light micrograph
  33. Cell
  34. Evolution of life, artwork
  35. Human blood cells, SEM
  36. Conceptual image of DNA
  37. Synapses, artwork
  38. Dandelion plant stem, light micrograph
  39. Buttercup stem, light micrograph
  40. Pond life
  41. Microscopic view of bacteria
  42. Cell
  43. Sickle cell anaemia
  44. Muybridge Motion Study, 1870s
  45. Cardiac muscle, TEM
  46. Male Hercules Beetle
  47. Leukemia blood cells, light micrograph
  48. Conceptual image of DNA