What Are the Ejaculatory Ducts?
A sperm delivery tube for men. The ejaculation tube is about 2 cm long, penetrates the parenchyma of the prostate, and opens in the urethral prostate.
- Chinese name
- Ejaculation tube
- Foreign name
- ejaculatory duct
- Number
- 2
- Length
- 2cm
- lie in
- Bottom of bladder, running through prostate
- Function
- Promote sperm and seminal vesicle gland secretions
- A sperm delivery tube for men. The ejaculation tube is about 2 cm long, penetrates the parenchyma of the prostate, and opens in the urethral prostate.
Histological characteristics of ejaculatory ducts
- The ejaculation duct is a duct that passes through the prostate after the distal end of the ampulla of the vas deferens joins with the seminal vesicle gland duct, opening in the urethral prostate. Consists of mucosa, myometrium, and fibrous membrane.
- There are several longitudinal folds on the mucosal surface, until the ampullary folds become thin and irregular protrusions, which are repeatedly branched into a net. The mucosal epithelium is pseudostratified columnar, and the cells contain yellow pigment particles. The ampulla pit epithelium is mostly cuboid, with adenoid structure and secretory function. The inherent layer is rich in elastic fibers. Mucosal folds and glandular diverticula were smaller.
- The muscularis and adventitia are connected to the prostate stroma. Muscle layer is thick, divided into inner and outer longitudinal muscles and middle circular muscles. Muscle contraction facilitates sperm excretion. It is innervated by adrenergic nerves. During ejaculation, the sympathetic nerves are excited, causing smooth muscle rhythmic contractions and ejecting semen.
- The fibrous membrane is loose connective tissue with blood vessels and nerves.
Ejaculatory duct anatomy
- A pair of thin tubes formed by the end of the seminal vesicle gland drainage tube and the vas deferens, which is the shortest segment of the vas deferens tube and is about 2 cm long. It is penetrated from the bottom of the prostate, forward and inward, and passes between the prostate isthmus and posterior lobe, on both sides of the prostate capsule. The pipe diameter gradually becomes smaller from top to bottom, and the two sides approach each other. The end is opened in the sperm of the urethral prostate, on both sides of the prostate capsule.