Perineal artery
Encyclopedia
The perineal artery arises from the internal pudendal artery
, and turns upward, crossing either over or under the Transversus perinæi superficialis, and runs forward, parallel to the pubic arch
, in the interspace between the Bulbocavernosus
and Ischiocavernosus, both of which it supplies, and finally divides into several posterior scrotal branches
which are distributed to the skin and dartos tunic of the scrotum
.
As it crosses the Transversus perinæi superficialis it gives off the transverse perineal artery which runs transversely on the cutaneous surface of the muscle, and anastomoses with the corresponding vessel of the opposite side and with the perineal and inferior hemorrhoidal arteries.
It supplies the Transversus perinæi superficialis and the structures between the anus
and the urethral bulb.
Internal pudendal artery
The internal pudendal artery is an artery that branches off the internal iliac artery, providing blood to the external genitalia.The internal pudendal artery is the terminal branch of the anterior trunk of the internal iliac artery...
, and turns upward, crossing either over or under the Transversus perinæi superficialis, and runs forward, parallel to the pubic arch
Pubic arch
The eminences of the lower circumference of the true pelvis are separated by three notches: one in front, the pubic arch, formed by the convergence of the inferior rami of the ischium and pubis on either side. The angle at which they converge is known as the subpubic angle.-External links:* *...
, in the interspace between the Bulbocavernosus
Bulbospongiosus muscle
Bulbospongiosus is one of the superficial muscles of the perineum. It has a slightly different origin, insertion and function in males and females. In males, it covers the bulb of the penis...
and Ischiocavernosus, both of which it supplies, and finally divides into several posterior scrotal branches
Posterior scrotal arteries
-External links:* http://anatomy.uams.edu/AnatomyHTML/arteries_pelvis&perineum.html...
which are distributed to the skin and dartos tunic of the scrotum
Scrotum
In some male mammals the scrotum is a dual-chambered protuberance of skin and muscle containing the testicles and divided by a septum. It is an extension of the perineum, and is located between the penis and anus. In humans and some other mammals, the base of the scrotum becomes covered with curly...
.
As it crosses the Transversus perinæi superficialis it gives off the transverse perineal artery which runs transversely on the cutaneous surface of the muscle, and anastomoses with the corresponding vessel of the opposite side and with the perineal and inferior hemorrhoidal arteries.
It supplies the Transversus perinæi superficialis and the structures between the anus
Anus
The anus is an opening at the opposite end of an animal's digestive tract from the mouth. Its function is to control the expulsion of feces, unwanted semi-solid matter produced during digestion, which, depending on the type of animal, may be one or more of: matter which the animal cannot digest,...
and the urethral bulb.