Dartos - Sex Differences

Sex Differences

• In males it is termed tunica dartos and lies beneath the skin of the scrotum. In older males the dartos muscle loses its tone, and tends to cause the scrotum to be smoother and to hang down farther.
• In females, the same muscle fibers are less well developed and termed dartos muliebris, lying beneath the skin of the labia majora.
• It receives innervation from postganglionic sympathetic nerve fibers arriving via the ilioinguinal nerve and the posterior scrotal nerve. (http://anatomy.med.umich.edu/gastrointestinal_system/inguinal_tables.html)