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  • A picture is worth a thousand words
    Browse over 40,000 high quality diagrams, illustrations, and photos. Use them in your presentations or lectures. You can also upload your own images here.
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  • Featured: Action Potential Membrane Potential
    Action Potential Membrane Potential

    A plot of a neuron s membrane potential over time showing the action potential as a spike a brief reversal of membrane potential Right illustration of the events at one ...

  • Featured: Embryonic development of shepherd’s purse (Capsella), a eudicot
    Embryonic development of shepherd’s purse (Capsella), a eudicot

    After fertilization, a Capsella flower’s ovary develops into a fruit. An embryo surrounded by integuments forms inside each of the ovary’s many ovules.

  • Featured: Amniote Eggs: Snakes
    Amniote Eggs: Snakes

    Snakes hatching from the amniote eggs in which they developed.

  • Featured: Coelacanth
    Coelacanth

    This fish lives in underwater caves and canyons. Lobe-finned fishes, with fleshy fins supported by bones.
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