Name the structure formed from the union of the ampulla of the ductus deferens and the duct of the seminal vesicle

Appeared in: UP NHM CHO 7 Sept 2022(shift-1st)

Explanation

The ejaculatory duct is a paired structure, approximately 2.5 cm long, located within the prostate gland.
It is formed by the convergence of the duct from the seminal vesicle and the ampulla (the dilated end) of the ductus deferens.
Its primary function is to transport sperm and seminal fluid into the prostatic urethra during ejaculation.

Option B: The urethra is the final excretory pathway for both urine and semen. It receives semen from the ejaculatory ducts but is not formed by their union.
Option C: The prostate gland is a major accessory gland of the male reproductive system. It secretes fluid that contributes to semen volume but is not a duct formed by a union.
Option D: The spermatic cord is a larger, cord-like structure that contains the ductus deferens, blood vessels, nerves, and lymphatic vessels. It suspends the testis in the scrotum.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the male reproductive system as background academic context rather than a clinical decision trigger.
Understanding this anatomy is crucial for diagnosing and treating conditions like male infertility. Ejaculatory Duct Obstruction (EDO) is a cause of azoospermia (absence of sperm in ejaculate).
The close relationship between the ejaculatory ducts and the prostate gland is clinically significant. Benign Prostatic Hyperplasia (BPH) or prostate cancer can compress these ducts, leading to ejaculatory dysfunction or infertility.
What if the question asked about the structure that stores sperm? The answer would be the epididymis, where sperm undergo maturation and are stored before ejaculation.

How to Approach the Question

This is a factual recall question about anatomy. Read the question carefully to identify the specific structures involved: 'ampulla of the ductus deferens' and 'duct of the seminal vesicle'.
Visualize or recall the path of sperm from the testes to the outside.
Trace the ductus deferens as it travels from the epididymis towards the bladder.
Recall that it widens to form the ampulla and then joins with the duct from the seminal vesicle.
Identify the name of this newly formed duct.
Evaluate the options provided and select the one that matches the structure formed at this specific junction.

Concept Tested & Keywords

Concept Tested: Anatomy of the male reproductive system
Stem keywords: union, ampulla of the ductus deferens, duct of the seminal vesicle
Lead-in keywords: Name the structure

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E6 Histology Inderbir 11e p. 105-107

E6 Physiology Ganong 27e Vol 2 Part 3 p. 139-141

E6 Anatomy Applied Ashalatha 4e p. 378-380

Practise the full UP NHM CHO 7 Sept 2022(shift-1st)

Attempt every question from this paper in a timed mock, then review the full solution for each one.