Question

"Testes are extra-abdominal in position." Which of the following is the most appropriate reason.

• A. Narrow pelvis in males
• B. Special protection for testes
• C. Prostate gland and seminal vesicles occupy maximum space
• D. $2.0-{2.5}^o$C lower than the normal body temperature

Answer 1

Answer: (D)

$2.0-{2.5}^o$C lower than the normal body temperature

Testes are extra-abdominal in position. The testes are situated outside the abdominal cavity within a pouch called scrotum. The scrotum helps in maintaining the low temperature of the testes ($2–{2.5}^o$ C lower than the normal internal body temperature), which is necessary for spermatogenesis. The slightly cooler temperature of the scrotum is necessary for the development of normal sperm. So, the testes start their development in the abdominal cavity. But during the 7^th month of the foetal life, they descend into the scrotal sacs in presence of testosterone hormone.

So, only statement D is the most appropriate reason.