Testes
The testes (singular: testicle) are the reproductive organs that produce sperm.[1] The XY sex chromosomes begin developing these sex glands in embryos.
Unlike the female sex glands, ovaries, the testes are located outside of the body in the scrotum. This is to achieve temperature regulation necessary for optimal sperm production, as normal body temperature is too warm for this. As the testicular temperature drops, the testes are drawn closer to the body for additional warmth. As the testicular temperature increases, the testes lower away from the body in order to cool off.
The testes are apart of the endocrine system, a network in the body that releases hormones into the bloodstream. The hormones released by the testes allows the individual to mature through their physical appearance, thoughts, and behavior.[2]