File:Male vas deferens and bladder week6to10.jpg

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Male vas deferens and Bladder (week 6 to 10)

Schematic representations of the descent of the Wolffian duct (WD) or vas deferens. Anterior view.

(A) 6 weeks the WD (red) opens to the urogenital sinus at a site adjacent to the ureteral orifice (UR; green).

(B, C) 7–8 weeks rather than descent, there are individual variations in the WD position along the mediolateral axis as well as in left/right difference in morphology of the urogenital sinus (URS). The future bladder and urethra are not discriminated in the sinus.

(D) 8–9 weeks, the bilateral upper angles (arrows) of the URS start upward growth toward the umbilicus. At 9 weeks , depending on development of smooth muscles in the bladder as well as rhapdosphincter muscles of the urethra (RS), the descent of the vas deferens becomes evident. However, the epithelium is still same (arrowheads) between the future bladder and urethra.

(E) At 10–11 weeks a drastic upward growth of bladder smooth muscles as well as a developing prostate (PR) accelerates the descent of the vas.


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Reference

Jin ZW, Abe H, Hinata N, Li XW, Murakami G & Rodríguez-Vázquez JF. (2016). Descent of mesonephric duct to the final position of the vas deferens in human embryo and fetus. Anat Cell Biol , 49, 231-240. PMID: 28127497 DOI.


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 9. aacb-49-231-g009-l.jpg adjusted in size and labelled with PMID


Cite this page: Hill, M.A. (2024, April 17) Embryology Male vas deferens and bladder week6to10.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Male_vas_deferens_and_bladder_week6to10.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G[Category:Week 6]][Category:Week 9]]

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