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Ejaculatory Duct
Urogenital System

Ejaculatory Duct

ductus ejaculatorius

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Quick Facts

Location: Posterior to the bladder and superior portion of the prostate gland.

Arterial Supply: Inferior vesical artery.

Venous Drainage: Prostatic and vesical venous plexuses.

Innervation: Sympathetic: Hypogastric nerve.

Lymphatic Drainage: Internal iliac lymph nodes.

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Structure/Morphology

The ejaculatory duct is a muscular tube, approximately 2 cm long, that is formed by the union of the duct of the seminal vesicle and the ampulla of the ductus deferens. Small openings of the ejaculatory duct open on both sides, or within, the prostatic utricle, to open into the prostatic urethra.

Anatomical Relations

The ejaculatory duct is located posterior to the bladder and superior portion of the prostate gland.

Function

During ejaculation, the ejaculatory duct dilates and propels sperm and seminal fluid into the prostatic urethra, and subsequently out of the body via the external urethral orifice.

Arterial Supply

The ejaculatory duct is supplied by the inferior vesical artery, which is a branch of the internal iliac artery.

Venous Drainage

The ejaculatory duct is drained by the prostatic and vesical venous plexus, which drain into the internal iliac vein.

Innervation

During ejaculation, the hypogastric nerve controls rapid contraction of the ejaculatory duct, by way of the sympathetic nervous system.

Lymphatic Drainage

The lymph of the ejaculatory duct is drained into the internal iliac lymph nodes.

Learn more about this topic from other Elsevier products

Ejaculatory Duct

ScienceDirect image

The ejaculatory ducts (ej) are lined with secretory pseudostratified columnar epithelium (epi; inset) and lack a muscular layer under the lamina propria (lp).

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