What term describes pigment that originates outside the body, such as from tattoos or foods?

The term that describes pigment originating from outside the body is exogenous. This term is used to refer to substances that are derived externally or introduced from an external environment rather than produced internally by the body. For instance, tattoo ink is applied externally, and certain foods can impart color to the tissues, both of which demonstrate how these pigments come from outside sources.

Choosing exogenous correctly identifies the nature of these pigments, emphasizing their external origins, which is critical in various contexts such as histopathology or forensic science where the differentiation between internal (endogenous) and external (exogenous) substances is important for accurate analysis and reporting. Understanding this distinction helps mortuary science professionals interpret findings related to both bodily compositions and the effects of external influences on the body.