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}}</ref><ref name="WP">{{URLwikipedia|Scrotum#Skin_and_glands|Scrotum: Skin and glands|2021-12-28}}</ref>
The perineal raphe is a small, vertical, slightly raised ridge of [[scrotal skin]] under which is found the scrotal septum. It appears as a thin longitudinal line that runs front to back over the entire [[scrotum]]. In humans and some other mammals the [[scrotum]] becomes covered with pubic hair at [[puberty]].
The [[scrotum]] will usually tighten during penile [[erection]] and when exposed to cold temperatures. One testis is typically lower than the other to avoid compression in the event of an impact.<ref>{{REFjournal
[[Category:Physiology]]
[[de:Hodenhaut]]