Question

The given figure shows a diagrammatic sketch of a portion of a human male reproductive system. Identify the parts labeled as A, B, C, and D and select the correct option.

(a) A - Vas deferens, B - Seminal vesicle, C - Prostate, D - Bulbourethral gland.
(b) A - Vas deferens, B - Seminal vesicle, C - Bulbourethral gland, D - Prostate.
(c) A - Ureter, B - Seminal vesicle, C - Prostate, D - Bulbourethral gland.
(d) A - Ureter, B - Prostate, C - Seminal vesicle, D - Bulbourethral gland.

Answer 1

In the case of humans the sperms start their transportation from the seminal vesicles. The above-given options are all the accessory glands of the male reproductive system that helps in the release and transport of sperm.

Complete answer:
In males, the urethra is the common terminal duct for both the reproductive and excretory systems. In the testis, the seminiferous tubules open themselves via rete testis into the vasa efferentia which then later open into epididymis or vas deferens. This vas deferens acts as an ejaculatory duct as it opens into the urethra through the urinary bladder. The seminal vesicles are found behind the urinary bladder while the prostate is found in between the urinary bladder and the penis. The bulbourethral gland helps in the ejaculation of sperms and are located beneath the prostate.
The male reproductive system of humans consists of two testes, accessory ducts or spermatic ducts, sex glands, and the external genitalia or penis. They result in the production of sperm thus resulting in the formation of the semen.
The male reproductive system is found to be present in the pelvic region. The penis and the scrotum are the external part of the male that helps in the process of coitus. This is because the three cylindrical spaces of the tissue- two corpora cavernosa and one corpus spongiosum- get filled with blood.
The scrotum maintains the ideal temperature for testes that helps in the production of sperm. Testes are oval and produce the sex hormones testosterone and sperms. It also has several sphincters that may result in one to three seminiferous tubules, where the production of sperm takes place. The seminal vesicle along with the prostate and seminal vesicle helps in the nourishment of the sperms.
The rete testis, vasa efferentia, epididymis, and vas deferens are the four accessory ducts of the male reproductive system. The rete testis is the closest to the seminiferous tubules of the testes and vas deferens connect the whole duct system to the urethra which extends to the penis. The bulbourethral gland along with seminal vesicles and prostate glands constitute the sex glands.

So, the correct answer is ‘A - Vas deferens, B - Seminal vesicle, C - Prostate, D - Bulbourethral gland’.

Note:
The male reproductive system of humans helps in the production, transportation, and conservation of the sperms, these sperms are the male gametes in humans that are essential for the process of sexual reproduction and this, in turn, result in the continuation of human generations. The sperms fuse with the egg cell during sexual reproduction which later produces a zygote and from this new individual develops.