Question

Temperature of the scrotum as compared to the abdominal cavity is less by
a.1°C
b.5°C
c.3°C
d.10°C

Answer 1

Hint: Scrotum is a loose pigmented pouch of skin arising from the lower abdominal wall below the pubic symphysis and it hangs between and in front of the groin part of the thigh. The wall of the scrotum consists of several different layers.

Complete answer:
The scrotum helps in maintaining the low temperature of the testes by about 2°-3°C lower than the normal body temperature. The lower temperature of testes is needed for the spermatogenesis. In adult males, the shape of the testis is oval, with a length of about 4-5 cm and a width of about 2-3 cm and it is covered by the dense covering. Each testis is divided into about 250 compartments and they are known as testicular lobules and each lobule consists of three highly coiled seminiferous tubules in which sperm are produced. Each seminiferous tubule is lined on its inside by two types of cell and they are male germ cells and the Sertoli cells. The male germ cell goes through meiotic division which finally leads to the formation of sperm while the Sertoli cell provides nutrition to the germ cell.
Scrotum plays an important role as it protects the testis from external injuries. The wall of the scrotum contains smooth muscle fibres which contract in response to cold and pull the scrotum close to the body while the warmth causes the scrotum to relax.
Hence, the correct answer is 3°C.

Note: The failure of the testis to descend in the scrotum is known as cryptorchidism and this disorder is known as sterility. The creation of testosterone remain unchanged and thus the development of sex organ and sex character also remain unchanged.