Endogeny (biology)

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

For endogeny or endogeneity in other contexts, see Endogeneity and Exogeny.

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

References
  1. "Endogenous | Define Endogenous at Dictionary.com". Dictionary.reference.com. Retrieved 2011-07-11.
  • The dictionary definition of endogeny at Wiktionary
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