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Urethral crest

Urethral crest

The male urethra laid open on its anterior (upper) surface. (Urethral crest labeled at upper right.)
Latin	crista urethralis urethrae masculinae, crista urethralis urethrae femininae
Gray's	subject #256 1234
Dorlands/Elsevier	c_62/13538713

The urethal crest is an anatomical feature present in the urinary system of both males and females.

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In males, the urethral crest is known as the crista urethralis masculinae, or the crista phallica, and is a longitudinal fold on the posterior wall of the urethra extending from the uvula of the bladder through the prostatic urethra..^[1] It is from 15 to 17 mm. in length, and about 3 mm. in height, and contains muscular and erectile tissue. When distended, it may serve to prevent the passage of the semen backward into the bladder.^[2]

In females, it is known as the crista urethralis femininae, and is a conspicuous longitudinal fold of mucosa on the posterior wall of the urethra.^[3]

Additional images

References

^ http://www.biology-online.org/dictionary/Crista_urethralis_masculinae
^ http://education.yahoo.com/reference/gray/subjects/subject?id=256#p1234
^ http://www.biology-online.org/dictionary/Crista_urethralis_femininae

v • d • e Male reproductive system
Scrotum	layers (skin, Dartos, External spermatic fascia, Cremaster/Cremasteric fascia, Internal spermatic fascia) • Perineal raphe • Spermatic cord
Testes	layers (Tunica vaginalis, Tunica albuginea) • Appendix • Mediastinum • Lobules • Septa • Leydig cell • Sertoli cell • Blood-testis barrier
Spermatogenesis	Spermatogonium • Spermatocytogenesis • Spermatocyte • Spermatidogenesis • Spermatid • Spermiogenesis • Spermatozoon
seminal tract	Seminiferous tubules (Tubuli seminiferi recti, Rete testis, Efferent ducts) • Epididymis (Appendix) • Vas deferens (Ampulla) • Ejaculatory duct
urinary tract	Internal urethral orifice • Urethra (Prostatic, Intermediate, Spongy, Navicular fossa) • External urethral orifice
accessory glands	Seminal vesicles (Excretory duct of seminal gland) • Prostate (Urethral crest/Seminal colliculus/Prostatic utricle/Ejaculatory duct, Prostatic sinus/Prostatic ducts) • Bulbourethral glands
Penis	root (Crus, Bulb, Fundiform ligament, Suspensory ligament) • body (Corpus cavernosum, Corpus spongiosum) • glans (Foreskin, Frenulum, Corona) • fascia (superficial/subcutaneous, deep/Buck's) • Tunica albuginea - Septum of the penis