In case of mammals, testis are found in scrotal sacs outside the viscera because

Question

In case of mammals, testis are found in scrotal sacs outside the viscera because, spermatogenesis requires a lower temperature., mammals are highly evolved animals., of the presence of a long vas deferens., of limited space due to the presence of urinary bladder.

MARKS App · Accepted Answer

In man, both testes normally remain suspended in a pouch called Scrotum outside the abdominal cavity. This keeps the testes at a cooler temperature than the body temperature (about 2°C below) this is essential for the maintenance and function of the spermatogenic tissue of the testes. Testes descend in the scrotal sac when fetus is about 7 month old and occurs under the influence of FSH and testosterone.

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