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: The [[testes]] are outside the body instead of inside because [[Sperm Cell|sperm]] need to be kept cooler than [[Human Body Temperature|body temperature]] to survive.
: The [[testes]] are always making new [[Sperm Cell|sperm]].
==Key Stage 4==
===Meaning===
The [[testes]] are a pair of [[Organ|organs]] in the [[Male Reproductive System|male reproductive system]] responsible for making [[sperm]]. They are also [[Endocrine Gland|endocrine glands]] in the [[Endocrine System|endocrine system]].
===About Testes in the Male Repdroductive System===
: The '''testes''' produce the male [[gamete]] known as [[sperm]].
: The [[testes]] are found inside a sack called the [[scrotum]].
: During [[ejaculation]] the [[sperm|sperm cells]] leave the [[testes]] via the [[Sperm Duct|sperm duct]].
===About the Testes in the Endocrine System===
: The [[testes]] are [[Endocrine Glands|endocrine glands]] which produce a [[hormone]] called [[testosterone]].