Endogeny (biology)

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Endogenous substances and processes are those that originate from within a system such as an organism, tissue, or cell.[1]

Endogenous substances and processes contrast with exogenous ones, such as drugs, which originate from outside of the organism.


  1. ^ "Endogenous | Define Endogenous at Dictionary.com". Dictionary.reference.com. Retrieved 2011-07-11.

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