[[File:CharaV3.jpg|thumb|right|The sex organs of a [[green algae|green alga]] ''[[Chara (alga)|Chara]]'' are the male [[Antheridium|antheridia]] (red) and female [[Archegonium|archegonia]] (brown).]]
AUn '''sexórgano organsexual''' orou '''reproductiveórnao organreprodutor''','''primaryé sexcalquera organ''',parte oranatómica '''primarydo sexualcorpo characteristic''',dun isorganismo anycomplexo anatomicalque partparticipa of the body in a complex organism that is involved inna [[reprodución sexual reproduction]] ande que togetherxuntos constituteconstitúen theo [[reproductivesistema systemreprodutor]]. TheOs externalórganos and visiblevisibles organsexternos, inen malesmachos ande femalesfemias, areson theos ''primaryórganos sexsexuais organsprimarios'' known as the '''genitals'''coñecidos orcomo '''genitaliaxenitais'''. TheOs internalórganos organsinternos arecoñecidos known as thecomo ''secondaryórganos sexsexuais organssecundarios''<ref name="Sex organ1">{{citecita web|titletítulo=Sex organ (sɛks ˈɔːɡən) | publishereditor=''[[Collins English Dictionary]]''|accessdatedataacceso=September 14, de setembro de 2013|url=http://www.collinsdictionary.com/dictionary/english/sex-organ}}</ref><ref name="Ashalatha">{{citecita booklibro |authorautor=P. R. Ashalatha, G. Deepa| titletítulo = Textbook of Anatomy and Physiology for Nurses | publishereditorial =JP Medical Ltd|pagespáxinas=252–274| isbn = 9350254239|yearano=2012| accessdatedataacceso = September 14, de setembro de 2013 | url =https://books.google.com/books?id=B87CMxNW5lgC&pg=PA252&dq=&hl=en&sa=X&ei=wRk1UpK-J6mg2gWO34H4Ag&ved=0CFUQ6AEwBjge#v=onepage&q=&f=false}}</ref> and aree sometimesson referredchamados toás asveces thecomo ''internalxenitais genitaliainternos''.
TheAs characteristicscaracterísticas thatque begincomezan toa appearaparecer duringdurante a [[puberty]], such as, in humans, [[pubic hair]] on both sexes and [[facial hair]] on the male, are known as [[secondary sex characteristic]]s.
[[Moss]]es, [[fern]]s, and some similar plants have [[gametangia]] for reproductive organs, which are part of the [[gametophyte]].<ref>{{cite web |url=http://biology.clc.uc.edu/courses/Bio106/mosses.htm |title=Mosses and Ferns |publisher=Biology.clc.uc.edu |date=2001-03-16 |accessdate=2012-08-01}}</ref> The [[flower]]s of [[flowering plant]]s produce [[pollen]] and [[egg cell]]s, but the sex organs themselves are inside the gametophytes within the pollen and the [[ovule]].<ref>{{cite web |url=http://www2.estrellamountain.edu/faculty/farabee/BIOBK/BioBookflowers.html |title=Flowering Plant Reproduction |publisher=Emc.maricopa.edu |date=2010-05-18 |accessdate=2012-08-01}}</ref> [[Conifer|Coniferous plants]] likewise produce their sexually reproductive structures within the gametophytes contained within the [[Conifer cone|cones]] and pollen. The cones and pollen are not themselves sexual organs.
