Testicles:Thetesticles(also called testes or gonads) are the male sex glands. They are located behind thepenisin a pouch of skin called the阴囊. The testicles produce and storesperm, and they are also the body's main source of male hormones (testosterone). These hormones control the development of the reproductive organs and other male characteristics, such as body and facial hair, low voice, and wide shoulders.
