Q.

Why is testis situated in scrotal sac outside the abdominal cavity in humans?

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a

Scrotum has slightly lower temperature compared to body temperature which is necessary for the process of spermatogenesis.

b

There is no enough space in the pelvic area for the testes to be housed internally.

c

This arrangements provides more space for the growth of epididymis.

d

The scrotum helps in maintaining slightly higher temperature than the normal body temperature which is necessary for spermatogenesis.

answer is A.

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Detailed Solution

Spermatogenesis occurs at 2.0o-2.5oC lower than body temperature. Scrotum helps in maintenance of the lower temperature.

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