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Accessory Organ

  • Definition: Any structure, other than a gonad (primary organ), that serves primarily to produce or to deliver a germ cell (e.g., yolk gland, oviduct, vas deferens), or to provide nourishment of the developing offspring by the mother (e.g., placenta, uterus).

    Source: Hickman, C.P., et al. 2011. Integrated Principles of Zoology. Fifteenth Edition. McGraw-Hill Higher Education.

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