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EMBRYONIC DEVELOPMENT & STEM CELL COMPENDIUM
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All Anatomical Compartments > Compartment Card

InM.Msn
Mesonephros is the principal excretory organ during early human embryonic life (4—8 weeks). The mesonephric tubules develop from the intermediate mesoderm caudal to the pronephros, shortly before pronephric degeneration. The mesonephros gradually degenerates, and parts of its duct system become associated with the male repro­ductive organs.

The gonad develops on the medial surface of the mesonephros, which also houses the primordia for the male (mesonephric) and female (Müllerian) ducts.
Mesonephros
Multiple Ancestors Single Ancestor No Descendants Develops from Part of Parent