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The mesonephros acts as a structure similar to the kidney that, in humans, functions between the sixth and tenth weeks of embryological life. Despite the similarity in structure, function, and terminology, however, the mesonephric nephrons do not form any part of the mature kidney or nephrons.
The mesonephric duct, also known as the Wolffian duct, archinephric duct, Leydig's duct or nephric duct, is a paired organ that develops in the early stages of embryonic development in humans and other mammals.
Kidney development, or nephrogenesis, describes the embryologic origins of the kidney, a major organ in the urinary system.This article covers a 3 part developmental process that is observed in most reptiles, birds and mammals, including humans.
The most significant function of the aorta gonad mesonephros region is its role in definitive haematopoiesis. Definitive haematopoiesis is the second wave of embryonic haematopoiesis and give rise to all hematopoietic stem cells in the adult hematopoietic system.
In the outer part of the intermediate mesoderm, immediately under the ectoderm, in the region from the fifth cervical segment to the third thoracic segment, a series of short evaginations from each segment grows dorsally and extends caudally, fusing successively from before backward to form the pronephric duct.
In embryology, the genital ridge (genital fold or gonadal ridge) is the developmental precursor to the gonads.The genital ridge initially consists mainly of mesenchyme and cells of underlying mesonephric origin.
The female reproductive system is composed of two embryological segments: the urogenital sinus and the paramesonephric ducts. The two are conjoined at the sinus tubercle. [2] [3] Paramesonephric ducts are present on the embryo of both sexes.
The nephrogenic cord is a portion of the urogenital ridge which is the source of much of the urinary system. [1]The nephrogenic cords are bilateral condensations of the intermediate mesoderm. [2]