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  • Featured: Negative feedback as a mechanism by which homeostatic control systems operate.
    Negative feedback as a mechanism by which homeostatic control systems operate.

    In this example loss of blood results in a drop in blood pressure which could be life threatening if not corrected Effectors such as the heart and blood vessels help ...

  • Featured: From left to right: Size development, biometrical changes in the cranium, reduction of toes ...
    From left to right: Size development, biometrical changes in the cranium, reduction of toes ...

    From left to right: Size development, biometrical changes in the cranium, reduction of toes (left forefoot)

  • Featured: Use of Flight Muscles
    Use of Flight Muscles

    Flight muscles pull wings up and down during flight.

  • Featured: Roundworm Body Plan
    Roundworm Body Plan

    Roundworms phylum Nematoda are unsegmented pseudocoelomate worms with a secreted cuticle that is molted Most are decomposers some are parasites Human parasites include Ascaris intestinal roundworm Wuchereria elephantiasis and Enterobius ...

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