Mesonephros

Mesonephros is one of the organs of the excretory system of the human embryo, which was found in the mid-20th century. It is a collection of primitive cells or tissues that perform the function of secreting uric acid. Mesonephros can be found in both mammals and other animals

Mesonephros is a paired organ that develops from nephrogenic tissue and is one of the components of the urinary system. It is located in the middle part of the torso and is important for the development of the genital organs.

Mesonephros begins to develop on the 28th day of embryonic development and reaches its maximum size on the 35th day. By the 50th day of development, it begins to regress and completely disappears by the 70th day.

The main function of the mesonephros is the formation of the genital organs and primary urinary tract. It also plays a role in the development of the immune system and bone formation.

Depending on gender, mesonephros can have different shapes and sizes. In men it is usually more developed and larger in size than in women. In men, the mesonephros forms the testes and vas deferens, as well as the primary urinary tract, which leads to the bladder and urethra. In women, the mesonephros regresses and does not form the reproductive system.

The development of mesonephros in boys begins with the formation of the Wolffian body. This is the primary sexual formation that develops from the mesonephrogenic epithelium. The Wolffian duct, which is formed from the Wolffian body, connects with the mesonephros and forms the primary urine. Subsequently, the primary urinary tract develops into the ureters, bladder and urethra.

In girls, mesonephros does not develop, but instead the Wolffian body regresses at 10-12 weeks of development. Instead, a Müllerian body arises and develops into the ovaries and uterus.

Thus, mesonephros plays an important role in the development of the reproductive organs in men and the primary urinary tract in both sexes. Its development begins in the early stages of embryonic development and it regresses by day 70.

Introduction

Mesonephros is a part of the primary kidney, consisting of an epithelial tube and a tubule lined with cylindrical cells in the shape of a curved bracelet that surrounds this tube. It does not form a urinary tract and dissolves quickly during embryogenesis. In men, mesonephrosis completely disappears after the third month of embryonic development. In general, mesonephrosis remains functional, that is, there are a small number of epithelial cells surrounded by a wall of smooth muscle, which are located medial to the primary kidney in a strip structure with cavities more or less filled with tissue. In women, the end product of the mesonephros is believed to be the organs of the paraovarian glands.