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expanded definition to include temperature regulation.
The '''testes''' (singular: '''testicle''') are the [[organ]]s that produce [[sperm]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
The '''testes''' (singular: '''testicle''') are the [[organ]]s that produce [[sperm]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
Educational Ministries, Inc. 1998</ref>
Educational Ministries, Inc. 1998</ref> Unlike the [[ovary|ovaries]], they are located outside of the body in the scrotum. This is to achieve temperature regulation necessary for optimal sperm production, as a 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.
==See also==
==See also==