Why does testes lie outside the abdomen in human males?

Q. Why are the human testes situated in the scrotum outside the abdomen?

Q. Name the hormone secreted by tests.The testes are situated outside the abdomen in human male.Give reason.

Q. In human males, the testes lie in the scrotum outside the body because it helps in the
(a) process of mating
(b) formation of sperms
(c) easy transfer of sperms
(d) all the above

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

Q. Give Reason for the following:
[Review Questions - SAQ - 3,4]
(a) Testes lie outside the abdomen in a scrotum.
(b) A very large number of sperms should be present in the semen.