Ejaculatory Duct

Question 1

The inferior vesical artery, a branch of the internal iliac artery, provides blood to the ejaculatory ducts. Venous blood is drained via the prostatic and vesical venous plexuses into the internal iliac vein. Sympathetic fibers from the hypogastric nerve mediate contraction during ejaculation. Lymph from the ejaculatory ducts drains into the internal iliac lymph nodes. [1]

During ejaculation, these ducts propel sperm and seminal fluid from the seminal vesicles and ductus deferens into the prostatic urethra. The high-pressure environment within the ejaculatory ducts prevents the retrograde flow of urine into these structures. [15]

Question 2

Each duct starts at the ……. and ……

Answer 2

base of the prostate and terminates at the seminal colliculus (verumontanum).

Question 3

The ducts are primarily collagenous conduits with minimal muscular layers, serving as channels for ….. rather than actively contracting during ejaculation.

Answer 3

semen

Answer 4

luminal diameter

Question 5

The …… decreases progressively as the ducts approach their termination.

Answer 5

luminal diameter

Question 6

The ejaculatory ducts are divided into three segments:
……………
……………
…………….

Sympathetic fibers from the hypogastric nerve mediate contraction during ejaculation. Lymph from the ejaculatory ducts drains into the internal iliac lymph nodes.

During ejaculation, these ducts propel sperm and seminal fluid from the seminal vesicles and ductus deferens into the prostatic urethra. The high-pressure environment within the ejaculatory ducts prevents the retrograde flow of urine into these structures. [15]

Answer 6

an initial segment with a well-defined muscular layer, a middle segment also muscular, and a distal segment that may lack significant musculature.

Question 7

The openings of the ejaculatory ducts are typically located …….. lateral to the neck of the prostatic utricle at 5 and 7 o’clock positions relative to the verumontanum.

Answer 7

2-3 mm

Question 8

The vasculature, innervation, and lymphatics of the ejaculatory ducts are the same as those for ………

Answer 8

the ductus deferens.

Question 9

The inferior vesical artery, a branch of the ……., provides blood to the ejaculatory ducts.

Answer 9

internal iliac artery

Question 10

Venous blood is drained via the ……. and ……into the internal iliac vein.

Answer 10

prostatic and vesical venous plexuses

Question 11

The ejaculatory ducts are 2 cm in length and derived from the union of the seminal vesicle and the ampulla of the vas deferens.

Question 12

Each duct starts at the base of the prostate and terminates at the seminal colliculus (verumontanum).

Question 14

The ducts are primarily collagenous conduits with minimal muscular layers, serving as channels for semen rather than actively contracting during ejaculation.

Question 15

The luminal diameter decreases progressively as the ducts approach their termination.

Question 18

The ejaculatory ducts are divided into three segments: an initial segment with a well-defined muscular layer, a middle segment also muscular, and a distal segment