Proliferation of endoderm induced by the paramesonephric ducts
Sinus tubercle
Urogenital sinus of female human embryo of eight and a half to nine weeks old.
Anatomical terminology
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Sinus tubercle (also known as sinual tubercle[1] or Müllerian eminence) is the proliferation of endoderm induced by the paramesonephric ducts. It is located in the developing fetus between the orifices of the mesonephric ducts on the urogenital sinus.[1] The uterovaginal primoridium, which is a fusion of the caudal ends of paramesonephric ducts, contacts the dorsal wall of the urogenital sinus and, induces the formation of the sinus tubercle. This occurs in both sexes:
In the female, the mesonephric duct loses all association with the gonad and disappears. The sinus tubercle then gives rise to the sino-vaginal bulbs and, when it later becomes solid it is referred to as the vaginal plate.[1] It likewise gives rise to the hymen, which eventually breaks down in most cases.
In the males, the sinus tubercle gives rise to the seminal colliculus.
^ abcRuchelli, Eduardo D.; Ruchelli, Eduardo D.; Huff, Dale S.; Huff, Dale S. (2011), Ernst, Linda M.; Ruchelli, Eduardo D.; Huff, Dale S. (eds.), "Vagina", Color Atlas of Fetal and Neonatal Histology, New York, NY: Springer, pp. 195–198, doi:10.1007/978-1-4614-0019-6_17, ISBN 978-1-4614-0019-6, retrieved 2021-05-27
Sinustubercle (also known as sinual tubercle or Müllerian eminence) is the proliferation of endoderm induced by the paramesonephric ducts. It is located...
elevation, the sinustubercle, on the ventral part of the cloaca between the orifices of the mesonephric ducts. At a later stage the sinustubercle opens in...
lateral sides of the genital ridge and terminate at the sinustubercle in the primitive urogenital sinus. In the female, they will develop to form the fallopian...
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partially covers the external vaginal opening that derives from the sinustubercle during fetal development and is homologous to the male seminal colliculus...
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plantar surface with medial and lateral tubercles on its surface. Besides, there is another peroneal tubercle on its lateral surface. On its lower edge...
becomes the primary urogenital sinus. The urogenital sinus, in turn, divides into the superficial definitive urogenital sinus and the deeper anterior vesico-urethral...
both males and females have similar origins. They arise from the genital tubercle that forms anterior to the cloacal folds (proliferating mesenchymal cells...
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caudal cell mass of the fetal mesoderm as the urogenital sinus separates from the genital tubercle and rectum to form the penis.[citation needed] The first...
of the urethral groove on the belly aspect of the genital tubercle – the urogenital sinus closes completely to form the spongy urethra and the labioscrotal...
the coronary sinus (also called the Thebesian valve, after Adam Christian Thebesius) is a valve located at the orifice of the coronary sinus where the coronary...
between the rough: 56 trabecular portion and the smooth, sinus venosus-derived portion (sinus venarum) of the internal surface of the right atrium. The...
node, the natural and primary pacemaker, and the resultant rhythm is a sinus rhythm. Sometimes a secondary pacemaker sets the pace, if the SA node is...
back section of the interatrial septum near the opening of the coronary sinus, and conducts the normal electrical impulse from the atria to the ventricles...
pulmonary valve at the pulmonary artery. The heart also has a coronary sinus valve and an inferior vena cava valve, not discussed here. The heart valves...
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a sinus called an aortic sinus or sinus of Valsalva. In two of these cusps, the origin of the coronary arteries are found. The width of the sinuses in...
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