On either side of the

urethral crest The urethral crest is an anatomical feature present in the urinary system of both males and females. In males, the urethral crest is known as the ''crista urethralis masculinae'', or the ''crista phallica'', and is a longitudinal fold on the poste ...

is a slightly depressed fossa, the prostatic sinus, the floor of which is perforated by numerous apertures, the orifices of the

prostatic ducts The prostatic ducts (or prostatic ductules) open into the floor of the prostatic portion of the urethra, and are lined by two layers of epithelium, the inner layer consisting of columnar and the outer of small cubical cells. Small colloid masses, ...

from the lateral lobes of the

prostate The prostate is both an accessory gland of the male reproductive system and a muscle-driven mechanical switch between urination and ejaculation. It is found only in some mammals. It differs between species anatomically, chemically, and phys ...

References

External links

* - "The Male Pelvis: The Prostate Gland" * () Prostate {{genitourinary-stub