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    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: The reflex arc
    The reflex arc

    The re ex arc Cell body of Axon of afferent neuron afferent neuron Cell body of Impulse direction Interneuron Pain receptor in skin Spinal cord Cell body of efferent neuron ...

  • Featured: Hypersensitive Response
    Hypersensitive Response

    Evidence of a hypersensitive response in a leaf Brown spots are dead tissue where germinating fungi pen-etrated the leaf s epidermis triggering a release of hydrogen peroxide and nitric oxide ...

  • Featured: The vertebrate endoskeleton.
    The vertebrate endoskeleton.

    The vertebrate endoskeleton.

  • Featured: Spore Bearing Structures of Pilobolus
    Spore Bearing Structures of Pilobolus

    Spore-bearing structures of Pilobolus. The name means “hat-thrower.” The dark “hats” are sporangia (spore sacs).
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