Endogenous substances and processes are those that originate from within a system such as an organism, tissue, or cell. The term is chiefly used in biology but also in other fields.The term has also been applied to sociological concepts. See (Vasey 2002 p. 8). Endogenous substances and processes contrast with exogenous ones, such as drugs, which originate from outside of the organism. Endogenous processes Endogenous effects can modulate and regulate systems, in conjunction with environmental influences. Endogeny can refer to changes that originate from within a system. Endogenous changes can occur in social systems and can be modelled by Marxian dialectics.%DIFDELCMD < %DIFDELCMD < %%% Examples of endogenous processes include: Senescence (biological aging) The menstrual cycle The self-sustained circadian rhythms of plants and animals. Endogenous regeneration, which refers to the ability of cells to engage in the repair and regeneration process. Endogenous biological clocks and biological rhythms originating from endogenous mechanisms allow forms of biochronometry.%DIFDELCMD < %DIFDELCMD < %%% See also Endocrine system Exogeny Notes
Endogenous substances and processes are those that originate from within a system such as an organism, tissue, or cell. Endogenous substances and processes contrast with exogenous ones, such as drugs, which originate from outside of the organism. %DIFDELCMD < %DIFDELCMD < %%% %DIFDELCMD < %DIFDELCMD < %%% 
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The term is chiefly used in biology but also in other fields.The term has also been applied to sociological concepts. See (Vasey 2002 p. 8).
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Endogenous processes Endogenous effects can modulate and regulate systems, in conjunction with environmental influences.
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Endogeny can refer to changes that originate from within a system. Endogenous changes can occur in social systems and can be modelled by Marxian dialectics.
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Examples of endogenous processes include:
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Senescence (biological aging) The menstrual cycle The self-sustained circadian rhythms of plants and animals. Endogenous regeneration, which refers to the ability of cells to engage in the repair and regeneration process. Endogenous biological clocks and biological rhythms originating from endogenous mechanisms allow forms of biochronometry.
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See also Endocrine system Exogeny
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Notes