What is the dartos fascia?
The dartos muscle is the thin rugated fascial muscle of the scrotum made of smooth muscle. Hence it is also referred to as dartos fascia or simply the dartos. It forms from the subcutaneous tissue of the scrotum and base of the penis and attaches to the scrotal skin and fibrous midline septum between the testes.
What does dartos fascia cover?
The dartos fascia or simply dartos is a layer of connective tissue found in the labia, penile shaft, foreskin, and scrotum. The penile portion is referred to as the superficial fascia of penis or the subcutaneous tissue of penis, while the scrotal part is the dartos proper.
What is the function of dartos?
Underneath the skin is the dartos muscle, or the tunica dartos. The tunica dartos helps to regulate the temperature of the testicles by contracting to reduce the surface area of the scrotum and decrease heat loss, or relaxing to increase the surface area of the scrotum to help with cooling.
Where is the Cremasteric fascia derived from?
Cremaster muscle, derived from the internal oblique muscle at the deep inguinal ring. External spermatic fascia, derived from the external oblique aponeurosis at the superficial inguinal ring (present only in the scrotum and not in the inguinal canal)
What is the function of dartos and cremaster muscle?
The cremaster and dartos muscles work together to maintain the temperature of the testicles which is responsible for spermatogenesis. At lower temperatures, they raise the testicals closer to the body to retain heat, while at higher temperatures they relax the scrotum to promote heat loss.
What is Buck’s fascia continuous with?
Buck’s fascia is continuous with the external spermatic fascia in the scrotum and the suspensory ligament of the penis. On its ventral aspect, it splits to envelop corpus spongiosum in a separate compartment from the tunica albuginea and corporal bodies.
What is the result of contraction of the dartos muscle?
When the temperature is too low, the tunica dartos muscle contracts, causing the scrotal skin to wrinkle, and thus the scrotum has a smaller surface area for heat loss. Cold-induced contraction of the cremaster muscle also raises the testes to bring them closer to the warmer groin region.
What is the purpose of the cremaster and dartos muscles?
Is the dartos muscle voluntary?
Underneath the skin of the scrotum is a layer of involuntary smooth muscle, the tunica dartos. Just under the tunica dartos is another layer of muscle, the cremaster, which extends also to the spermatic cord.
What forms Cremasteric fascia?
The cremasteric fascia lies between the more superficial external spermatic fascia and the deeper internal spermatic fascia. It is a continuation of the aponeurosis of the abdominal internal oblique muscle.
Where is the tunica dartos located?
scrotum
The Dartos Tunic (tunica dartos) is a thin layer of non-striped muscular fibers, continuous, around the base of the scrotum, with the two layers of the superficial fascia of the groin and the perineum; it sends inward a septum, which divides the scrotal pouch into two cavities for the testes, and extends between the …
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