The development of the mesonephros does not take place till long after that of the pronephros.
The mesonephros of the larva disappears, and a fresh posterior part is formed.
The mesonephros (r), divided into an anterior sexual part connected with a rudimentary testicular network, and a posterior part.
The segmental tubes of the mesonephros undergo further important changes.
Posteriorly the Mllerian ducts and the ducts of the mesonephros remain united.
Owing to the formation of the accessory tubuli the segments of the mesonephros acquire a compound character.
The Wolffian body, which may be also called the mesonephros.
The general character of a slightly developed segment of the mesonephros at its full growth may be gathered from fig. 391.
It may be noted that in Lepidosteus the whole pronephros has exactly the character of a single segmental tube of the mesonephros.
The differentiation of a posterior section of the mesonephros into a special gland foreshadowing the metanephros of the Amniota.
mesonephros mes·o·neph·ros (měz'ə-něf'rəs, -rŏs', měs'-)
n. pl. mes·o·neph·roi (-něf'roi')
The second of the three excretory organs that develop in a vertebrate embryo, replaced by the metanephros in higher vertebrates. Also called wolffian body.