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Why are the testes of human males consid...

Why are the testes of human males considered extra bdominal? What is the significance of this condition?

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The testes are situated outside the abdominal cavity within a soft skin pouch called scrotum. The temperature of the testes in the scrotum is 2 - `2.5^@ c` lower than the internal body temperature and spermatogenesis require low temperature.
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