Pre-prostatic urethra

The pre-prostatic urethra is one of the four parts of the male urethra. The pre-prostatic urethra is also known as the intramural urethra, as it is the portion of the urethra which passes almost vertically through the wall of the urinary bladder, before it enters the prostate gland.

Both the length and diameter of the pre-prostatic urethra vary depending on whether the bladder is filling or emptying. The length varies between 0.5 cm and 1.5 cm.^[1]

References

↑ Moore K.L. & Dalley A.F. (2006) "Clinically Oriented Anatomy" Fifth Edition, Lippincott, Williams & Wilkins p402

Male reproductive system

Internal

Seminal tract

Testes	layers Tunica vaginalis Tunica albuginea Tunica vasculosa Appendix Mediastinum Lobules Septa Leydig cell Sertoli cell Blood–testis barrier

Spermatogenesis	Spermatogonium Spermatocytogenesis Spermatocyte Spermatidogenesis Spermatid Spermiogenesis Spermatozoon

Other	Seminiferous tubules Tubuli seminiferi recti Rete testis Efferent ducts Epididymis Appendix Stereocilia Paradidymis Spermatic cord Vas deferens Ampulla Ejaculatory duct

Accessory glands

External

Penis	root Crus Bulb Fundiform ligament Suspensory ligament body Corpus cavernosum Corpus spongiosum glans Foreskin Frenulum Corona fascia superficial deep Tunica albuginea Septum of the penis

Urinary tract	Internal urethral orifice Urethra Prostatic Intermediate Spongy Navicular fossa External urethral orifice Lacunae of Morgagni Urethral gland

Scrotum	layers skin Dartos External spermatic fascia Cremaster Cremasteric fascia Internal spermatic fascia Perineal raphe Scrotal septum

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