RT Journal Article
T1 The Embryonic Ascent of the Kidney Revisited
A1 Fukuoka, Kenichiro
A1 Wilting, Joerg
A1 Rodríguez Vázquez, José Francisco
A1 Murakami, Gen
A1 Ishizawa, Akimitsu
A1 Matsubara, Akio
AB Although the embryonic kidney's ascent is well established, the intermediate morphological changes that occur during the process are unclear. To evaluate the morphological events that accompany the kidney's ascent, we examined serial sagittal sections from 24 embryos at 5-7 weeks gestation. Six specimens had bilaterally ascending kidneys that were between the levels of the second to fifth lumbar vertebrae, and each kidney had a primitive renal cortex surrounding clusters of ampullae, which branched from the pelvis, and a dense tissue band that connected the renal cortex with the embryonic adrenal cortex or celiac ganglia, and there was no adipose capsule or renal artery. The tissue band contained abundant nerve twigs from the major splanchnic nerve; thus, it was conceivable that it was sufficiently rigid to support the length of the retroperitoneal tissue mass that included the embryonic adrenal cortex, celiac ganglia, and kidney. The lumbar vertebral body's height was much shorter than that of the ascending kidney. However, the lower vertebral column's curvature was often maintained, even when the kidneys had ascended. Therefore, vertebral column straightening was not the only factor required to drive the ascent. Together with the growth of the thorax and liver, the adrenal cortex, ganglia, and kidney appeared to change simultaneously at a position relative to the vertebrae. The renal artery established a connection to the renal cortex after the ascent. Evaluations of frontal sections from five additional specimens suggested that from its initial position, the kidney extended upwards between bilateral umbilical arteries. Anat Rec, 302:278-287, 2019. © 2018 The Authors. The Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology published by Wiley Periodicals, Inc. on behalf of Wiley-Liss, Inc.
PB Wiley
SN 1932-8486
YR 2018
FD 2018-11-19
LK https://hdl.handle.net/20.500.14352/109502
UL https://hdl.handle.net/20.500.14352/109502
LA eng
NO Fukuoka K, Wilting J, Rodríguez-Vázquez JF, Murakami G, Ishizawa A, Matsubara A. The Embryonic Ascent of the Kidney Revisited. Anat Rec (Hoboken). 2019 Feb;302(2):278-287. doi: 10.1002/ar.23930
DS Docta Complutense
RD 11 abr 2025