Scrotal skin

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Human scrotum in a relaxed state (left) and a tense state (right)

Scrotal skin is the skin which builds the scrotum or scrotal sac which is more highly pigmented compared to the rest of the body. The septum is a connective tissue membrane dividing the scrotum into two cavities.[1][2]

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.[3][2]


  1. REFweb Scrotum, Encyclopædia Britannica. Retrieved 24 February 2015.
  2. a b REFweb Wikipedia article: Scrotum: Skin and glands. Retrieved 28 December 2021.
  3. REFjournal Bogaert AF. Genital asymmetry in men PDF. Human Reproduction. 1997; 12(1): 68–72. PMID. DOI.