Question

The given figure shows the male reproductive system. Some structures are marked as 1, 2, 3, and 4. Identify the structure whose removal will cause the sperm to be reacted with acidic urine in the urethra.

A) 1
B) 2
C) 3
D) 4

Answer 1

Hint: The marked structure Seminal vesicles, the urine bladder, the ejaculatory duct, and the bulbourethral gland are referred to as 1, 2, 3, and 4 sequentially. Under the prostate gland is a pea-sized gland known as the bulbourethral gland, or Cowper's gland, whose secretion balances the acidity of the urine in the urethra.

Complete Step by Step Answer:
A seminal vesicle is often thought of as being male. The fluids that will become semen are produced by the two seminal vesicles, which are glands. The seminal glands or vesicular glands are other names for the vesicles.
Urine is temporarily stored in the urinary bladder. It is located in the pelvic cavity, behind the symphysis pubis, below the parietal peritoneum. The size and shape of the urinary bladder vary depending on how much urine it can contain and how much pressure other organs are applying to it.
The vas deferens and the duct of the seminal vesicle combine to generate each ejaculatory duct. They open into the urethra above the seminal colliculus after passing through the prostate. Semen leaves the body after ejaculation through the urinary meatus after passing through the prostate gland and urethra.
Both of the male's pea-shaped bulbourethral glands, also known as Cowper's Gland, are situated beneath the prostate gland at the start of the internal section of the penis. They add fluids to semen during the ejaculatory process. The main function of ejaculatory duct is that it connects the male reproductive and urinary systems by delivering sperm into the urethra and adding prostate-derived additives and secretions necessary for sperm activity .
Hence, option D is the correct answer.

Note: Near the base of the penis, there are two tiny, pea-sized bulbourethral (Cowper's) glands that are paired. Each gland has a little channel that enters the penile urethra's proximal end. In reaction to sexual stimulation, the bulbourethral glands exude an alkaline mucus-like material. This fluid lubricates the tip of the penis during sex, helps to balance the acidity of the vagina, and neutralises the acidity of the urine residue left in the urethra.