Testicles

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The testicles, or testes (singular testis), are the male generative glands in animals. Male mammals have two testicles, which are often contained within an extension of the abdomen called the scrotum.

In land mammals, with the exception of the elephant, the testes are located outside of the body, as they are suspended by the spermatic cord and within the scrotum. In british English the testicles are called bollocks.