urogenital sinus

urogenital sinus
urogenital sinus n the ventral part of the embryonic mammalian cloaca that is formed by the growth of a fold dividing the cloaca where the gut and allantois meet and that eventually forms the neck of the bladder and some of the more distal portions of the genitourinary tract

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sinus urogenitalis an elongated sac formed by division of the cloaca in the early embryo, communicating with the mesonephric ducts and primordial urinary bladder; it forms most of the bladder in both sexes, the vestibule, urethra, and vagina in the female, and most of the urethra in the male.

Medical dictionary. 2011.

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  • Urogenital sinus — Infobox Embryology Name = PAGENAME Latin = sinus urogenitalis GraySubject = 252 GrayPage = 1213 Caption = Urogenital sinus of female human embryo of eight and a half to nine weeks old. (Urogenital sinus labeled at bottom.) Caption2 = Stages in… …   Wikipedia

  • urogenital sinus — the bladder combined with the oviducts in females …   Dictionary of ichthyology

  • Definitive urogenital sinus — Urogenital sinus of female human embryo of eight and a half to nine weeks old. (Urogenital sinus labeled at bottom.) …   Wikipedia

  • sinus tubercle — a protrusion into the urogenital sinus caused by the caudal growing of the paramesonephric ducts; it is the primordium of the uterus. Called also MÑŒller or mÑŒllerian t …   Medical dictionary

  • sinus — 1. [TA] A channel for the passage of blood or lymph, without the coats of an ordinary vessel; e.g., blood passages in the gravid uterus or those in the cerebral meninges. 2. [TA] A cavity or …   Medical dictionary

  • urogenital canal — see under sinus …   Medical dictionary

  • UGS — urogenital sinus …   Medical dictionary

  • UGS — • urogenital sinus …   Dictionary of medical acronyms & abbreviations

  • Development of the reproductive system — The development of the reproductive system is a part of prenatal development, and concerns the sex organs. It is a part of the stages of sexual differentiation. Because its location to a large extent overlaps the urinary system, the development… …   Wikipedia

  • Development of the urinary and reproductive organs — The development of the urinary and reproductive organs as a part of the prenatal development, concerns the urinary system and sex organs. The latter is a part of the stages of sexual differentiation. The urinary and reproductive organs are… …   Wikipedia

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