Why the testes lies outside the body cavity in the scrotal sac?
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Because it requires a temperature 2-3 degrees less then our body temperature to perform it's function.
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(1) During early foetal life, the testes develop in the lumbar region of the abdominal cavity just below the kidney but during seventh month of development, they descend permanently into the respective scrotal sacs through a passage called inguinal cana
(2) For the development of the sperm, lesser temperature than the body temperature required.
(3) If the testes remain in the abdominal cavily, then the sperm production does not take place.
(4) This may result in impotency. Therefore, testes are located outside the body cavity.
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