QS Study

The scrotum is a pouch of skin containing the testicles. It is a sac of skin that hangs from the body at the front of the pelvis, between the legs. Scrotal tissues help protect the structures inside the testicles, where sperm and important hormones are produced. It also protects the testicles and major blood vessels, as well as tubes that release sperm from the testicles into the penis for ejaculation.

Function: Maintenance of proper temperature for spermatogenesis

Each side of the scrotum usually consists of a:

  • Each testicle produces hormones, the main one being testosterone, with the help of parts of the brain like the hypothalamus and pituitary gland.
  • An epididymis is located on the top of each testicle.
  • Spermatic cord. Each spermatic cord contains blood vessels, nerves, lymph vessels, and a tube called the vas deferens.
  • Cremaster muscle. Each cremaster muscle surrounds one of the testicles and its spermatic cord.

Fig: Layers of the scrotum

Layers of the scrotum –

  • skin
  • dartos fascia and muscle
  • external spermatic fascia
  • cremasteric fascia
  • internal spermatic fascia
  • tunica vaginalis
  • tunica albuginea

Development

The scrotum is developed by the fusion of two genital swellings. The fusion line is represented by median raphae. The scrotum is developmentally homologous to the labia minora and labia majora. The raphe does not exist in females.

Homologous structure

Labia majora in the female is the homologue structure to the scrotum.