Question

In male mammals, excretory and reproductive systems share

(A) the vas deferens.

(B) the urethra.

(C) the seminal vesicle.

(D) the prostate.

Short answer

(A)The option “the vas deferens” isincorrect.

(B)The option “the urethra” iscorrect.

(C)The option “the seminal vesicle” isincorrect.

(D)The option “the prostate” is incorrect.

Step-by-step solution

Excretory system in mammals

The generation of urine in the kidneys and the release of carbon dioxide from the lungs are examples of excretion in animals. Urination and exhalation are the two ways to get rid of these waste items.

The excretory system comprises several organs and systems that vary in appearance depending on the animal species. Its major role is to filter out waste products coming from cellular metabolism or integrated from the environment, such as salt excess in seabirds during eating, and so on.

Explanation of option ‘(A)’

The vas deferens are a part of the reproductive system in males. The vas deferens is a long tube-like structure that connects the epididymis into the pelvic cavity behind the bladder. The vas deferens carries the sperm to the urethra during ejaculation.

Thus, the vas deferens are not the organ shared by both the excretory and reproductive systems.

Therefore, the given option is incorrect.

Explanation of option ‘(B)’

The urethra is an organ that is common to both the reproductive and excretory systems. The urethra is the tube that connects the bladder to the outside of the body. Its function is the removal of urine from the body. It also has the function of ejaculating semen.

Thus, the urethra is shared by both the reproductive and excretory systems.

Therefore, the given option is correct.

Explanation of option ‘(C)’

The seminal vesicle is an organ of the reproductive system in males. The seminal vesicle secretes a sugary liquid that provides energy to sperm and aids in their movement.

Thus, the seminal vesicle is not shared by both the excretory and the reproductive system.

Therefore, the given option is incorrect.

Explanation of option ‘(D)’

The prostate gland is located just below the urinary bladder in males. It surrounds the top portion of the tube that removes the urine from the bladder. The primary function of the prostate gland is to produce fluid that nourishes the sperms and transports them.

Thus, the prostate gland is not a common organ in both the excretory and reproductive systems.

Therefore, the given option is incorrect.