Endogenous (adjective)

1. Originating from within an organism, tissue, or cell, as opposed to being caused by external factors.
2. Originating from internal causes or factors, rather than from external sources.

Origin:

The word endogenous comes from the greek words endo, meaning within, and genes, meaning born or generated.

Examples:

1. Endogenous hormones are produced by the body's own cells.
2. Endogenous depression is caused by internal factors, such as genetics or brain chemistry.
3. Endogenous factors such as genetics and environment can influence a person's behavior.
4. Endogenous processes such as cell growth and repair are important for maintaining health.
5. Endogenous factors such as culture and history shape a society.