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  4. In most mammals, the testes are located in scrotal sac for

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Q. In most mammals, the testes are located in scrotal sac for

Human Reproduction

Solution:

In mammals, scrotal sacs (containing testes) act as thermoregulator, maintaining the temperature of the testes $2^° C$ lower than that of the body. This temperature is required for the spermatogenesis to occur, otherwise, the sperms could be destroyed by high temperature, resulting in sterility.