What is Sex organ?
[[File:External genitalia of male and female.jpg|thumb|350x350px|Women (left) and men (right) have different sex organs.]] The '''sex organs''', which [[science|scientists]] call the '''genitalia''' or '''genitals''', are the parts of the body that allow [[sexual reproduction]] (the making of children) to take place. They are also for [[urination]] (peeing), to remove waste products from the body. While all [[animal]]s have sex organs, this article is about the sex organs of [[human|human beings]]. The genitals include both organs that can be seen on the outside of the body (the primary genitalia or external genitalia), as well as internal organs (the secondary genitalia or internal genitalia). Sometimes, however, the words genitalia or genitals are used to refer only to the external sex organs. The sex organs are informally referred to as the private parts or privates. [[File:Comparision of female clitoromegaly and male penis.jpg|thumb|Female (left) and male (right) genitals are developed from the same bundle of tissue. The [[clitoris]] is homologous to the [[Human penis|penis]] and the [[labia majora]] are homologous to the [[scrotum]]. The clitoris shown is unusually large. The penis shown is smaller than usual due to temporary shrinkage.]] The genitals are the main parts of the human body that make men and women different. Some parts of the genitals are outside the body, while other parts are inside. In a man, his external genitals are the [[Human penis|penis]] and the [[scrotum]] (a bag that contains the [[testicle]]s). Inside his body the testicles produce [[sperm]] and a substance called [[testosterone]] which makes a person grow into a man and feel like a man. Other [[gland]]s produce a [[fluid]] called [[semen]]. The part of a woman's genitals that is outside her body is called the [[vulva]]. Inside her body is the [[vagina]], which holds the penis during [[sexual intercourse]]; the [[uterus]] (womb), in which a baby grows when the woman is [[pregnancy|pregnant]]; the [[ovary|ovaries]], which produce [[