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==Function==
In the penis, the loose attachment of the dartos fascia to [[Buck's fascia ]] is responsible for the high degree of mobility of the penile [[skin]] over the underlying tissue.<ref name=Campbell10 /> It is also responsible for carrying the blood supply of the penile [[skin]], a longitudinally-coursing anastomotic network of vessels that arise from the external pudendal vessels.<ref name=Campbell10 />
In the [[scrotum]], the tunica dartos acts to regulate the temperature of the testicles, which promotes spermatogenesis. It does this by expanding or contracting to wrinkle the [[scrotal skin]].
* Contraction reduces the surface area available for heat loss, thus reducing heat loss and warming the testicles.
The dartos muscle works in conjunction with the cremaster muscle to elevate the testis but should not be confused with the cremasteric reflex.
The dartos fascia keeps the [[foreskin ]] close to the [[glans penis ]] throughout life.<ref>{{REFjournal
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