File:Male urogenital sinus week 7to8 01.jpg

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Male urogenital sinus (week 7 to 8)

Sagittal sections of two embryos before differentiation of urogenital sinus into the bladder and urethra.

(A, B) A specimen of crown-rump length (CRL) 24 mm (7 weeks).

(C–E) A specimen of CRL 35 mm (8 weeks). (Stain - Haematoxylin Eosin)

The left-hand side of each panel corresponds to the anterior side of the pelvis. Panel (A) (panel C) is the most medial side of panels (A) and (B) (panels C–E). Intervals between panels are 0.3 mm (A–B), 0.4 mm (C–D), and 0.2 mm (D–E), respectively. All panels were prepared at the same magnification. Scale bar in panel B=1 mm. (A, B) The Wolffian duct (WD) opening (arrow) is located less than 0.1 mm inferior and 0.3 mm medial side of the ureteral opening (arrowhead; UR). (D) The WD opening (arrow) is located 0.5 mm inferior and less than 0.1 mm medial side of the ureteral opening (arrowhead). (C) Smooth muscles start differentiation in the future bladder wall (stars), but the epithelium appears to be a common type of the urogenital sinus (URS).

MD, Műllerian duct or paramesonephric duct; P, pubis; PC, peritoneal cavity; R, rectum; SMA, mesentery containing the superior mesenteric artery; ST, stomach; UA, umbilical artery; WD, Wolffian duct or mesonephric duct.

Online Editor - 24 mm CRL is usually Carnegie stage 21 Week 8.

Reference

<pubmed>28127497</pubmed>

PMID 28127497

http://acbjournal.org/DOIx.php?id=10.5115/acb.2016.49.4.231

Copyright

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Fig 1. acb-49-231-g001-l.jpg adjusted in size and labelled with PMID


Cite this page: Hill, M.A. (2024, April 25) Embryology Male urogenital sinus week 7to8 01.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Male_urogenital_sinus_week_7to8_01.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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current20:16, 31 January 2017Thumbnail for version as of 20:16, 31 January 2017800 × 988 (238 KB)Z8600021 (talk | contribs)==Male urogenital sinus (week 7 to 8)== Sagittal sections of two embryos before differentiation of urogenital sinus into the bladder and urethra. ===Reference=== PMID 28127497 ====Copyright==== This is an Open Access article distributed under the t...

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