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The testes, locatum in the scotum below the penis, are external to the body. As a result, they are cooler than the rest of the body, a necessary attribute for proper sperm production. In fact, the scrotum has muscles that allow it to contract and relax, raising and lowering the testes relative to the abdominal cavity, thereby regulating their temperature
cryptorchidism
The external sac-like structure of the male reproductive system is called the testes which reside in the scrotum.
That anatomical feature is called the scrotum.
Intersex is a group of conditions where there is a discrepancy between the external genitals and the internal genitals (the testes and ovaries). The older term for this condition is hermaphroditism.
Testes are housed outside the body in the scrotum because sperm production requires a slightly lower temperature than the rest of the body. By being outside, the testes can remain a few degrees cooler, which is necessary for optimal sperm production and function.
Most male mammals have testes in an external sac in order to protect their sperm from overheating. Excessive heat can impair sperm, negatively affecting fertility.
Testes
Testicles is the synonym for testes.
Females do not have testes. Testes are male reproductive organs. The female equivalent of testes is ovaries, which produce eggs and female sex hormones.