Question

In mammals, the testes occur in scrotal sacs outside the abdomen because of the

• A. Presence of urinary bladder
• B. Long vas deferens
• C. Requirement of low temperature for spermatogenesis
• D. Presence of rectum

Answer 1

The correct option is C Requirement of low temperature for spermatogenesis

Spermatogenesis
Scrotum is a pouch that hangs from the body in front of the pelvis in males. Testes are present inside the scrotum which helps in maintaining the temperature 2 - 2.5 ℃ lower than the normal body temperature. This is important for the formation of sperms (spermatogenesis).

Urinary bladder
Urinary bladder helps in storage of urine produced by the kidneys.

Vas deferens
Vas deferens is an accessory duct that ascends to the abdomen and loops over the urinary bladder where it is joined by the duct from the seminal vesicle to form the ejaculatory duct.

Rectum
Rectum is part of the digestive system which connects the colon to anus. It acts as a temporary storage site for feces.

Final answer (D) Requirement of low temperature for spermatogenesis