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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. Scanning electron micrograph of Staphylococcus and a dead human neutrophil
  12. Conceptual image of neuron
  13. Conceptual image of mitosis
  14. Cardiac muscle, TEM
  15. Bracken rhizome, light micrograph
  16. Lung cells, fluorescent micrograph
  17. Plant cell
  18. Embryo development 24-36 hours after fertilization
  19. Human anatomy showing deep muscles in the neck and upper back
  20. Scanning electron micrograph of HIV particles infecting a human H9 T cell
  21. Stem cells, artwork
  22. Castor oil stem, light micrograph
  23. Cell
  24. Mitochondrion, TEM
  25. Cardiac muscle and capillary, TEM
  26. Escher's Blue Butterfly
  27. Confused Flour Beetle Adult, SEM
  28. Conceptual image of neuron
  29. Cell
  30. Cannabinoid receptor binding, artwork
  31. Microscopic view of human B-cells
  32. Colon blood vessels, light micrograph
  33. Conceptual image of DNA
  34. Cell
  35. Evolution of life, artwork
  36. Human blood cells, SEM
  37. Synapses, artwork
  38. Dandelion plant stem, light micrograph
  39. Microscopic view of bacteria
  40. Pond life
  41. ATP Synthase Enzyme Complex, Illustration
  42. Buttercup stem, light micrograph
  43. Muybridge Motion Study, 1870s
  44. Cell
  45. Cardiac muscle, TEM
  46. Leukemia blood cells, light micrograph
  47. Male Hercules Beetle
  48. Common Dolphins