Scrotum
Sac of skin that protects the testicles / From Wikipedia, the free encyclopedia
For the obsolete dinosaur fossil name, see Megalosaurus § "Scrotum humanum".
In most terrestrial mammals, the scrotum (pl.: scrotums or scrota; possibly from Latin scortum, meaning "hide" or "skin")[1][2] or scrotal sac is a part of the external male genitalia located at the base of the penis. It consists of a sac of skin containing the external spermatic fascia, testicles, epididymides, and vasa deferentia. The scrotum will usually tighten when exposed to cold temperatures.
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The scrotum is homologous to the labia majora in females.