The scrotum is a musculocutaneous pouch that contains the testes, epididymis and the first portion of the vas deferens.

Each set of these organs (right and left) occupies a completely separate compartment, since the scrotum is subdivided into two stores by a median sagittal partition called the scrotal septum.

Superficially, this septum corresponds to a very evident cutaneous raphe (median rough line).

The scrotum is made up of different tissue layers that are stratified from the periphery to the depth, in the following seven planes.

Cutis : is the thin, wrinkled skin that has transverse folds and sparse hairs. In the midline we find the raphe of the scrotum.

Dartos tunic: the dartos tunic is a true cutaneous muscle, formed by smooth muscle fibers.

Subcutaneous tissue : consists of loose connective tissue.

External spermatic fascia: it is a conjunctive layer that comes from the two fasciae that wrap the external oblique muscle of the abdomen, which descends from the superficial inguinal annulus to enter the constitution of the scrotum.

Cremasteric fascia : this plane is represented by a thin conjunctival lamina that holds numerous bundles of striated muscle fibers in a vertical direction.

Together, these muscle fibers constitute the cremaster muscle and derive from the fibers of the internal oblique muscle of the abdomen.

Internal spermatic fascia: conjunctival lamina that derives from the transversalis fascia.

Tunica vaginalis : serous whose parietal layer represents the deepest layer of the scrotum, while the visceral layer involves the testis, epididymis and beginning of the vas deferens.

Source: NETTER, Frank H.. Atlas of Human Anatomy. 2nd edition Porto Alegre: Artmed, 2000.
Source: NETTER, Frank H.. Atlas of Human Anatomy. 2nd edition Porto Alegre: Artmed, 2000

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