Trigonum vesicae

Trigonum vesicae is the triangular field of the urinary bladder. It is defined by three points. At the back are the mouths of the ureters - ostia ureterum, at the front is the entrance to the urethra - ostium urethrae internum. It is characterized by a smooth surface, i.e. algae are missing here.

Other structures

 * plica interureterica is a fold of mucosa connecting the ostia of the ureter, supported by muscle. Behind it, the mucous membrane of the bladder is depressed, creating the fossa retrotrigonalis.
 * The uvula vesicae is located at the posterior edge of the ostium urethrae internum . It is a mucous membrane raised by means of a vascular ligament. It is not very noticeable in a woman. In men, it is found in the place of the middle lobe of the prostate, which, when enlarged, covers the mucous membrane of the uvula over the ostium urethrae internum , thus preventing the normal outflow of urine.
 * Bell's bundles are strips of muscle on the sides that raise the cilia of the mucous membrane.

Related Articles

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 * Urethra
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