Dorsal artery of the penis

The dorsal artery of the penis is a bilaterally paired terminal branch of the internal pudendal artery which passes upon the dorsum of the penis to the base of the glans penis, where it unites with its contralateral partner and supply the glans and foreskin.
The dorsal artery of the penis provides blood supply to the skin and fascia of the penis, and the erectile tissues of the penis.
The dorsal artery of the penis may be damaged in traumatic amputation of the penis and repairing the dorsal artery surgically prevents skin loss, but it is not essential for sexual and urinary function. Its hemodynamics and blood pressure can be assessed to test for sexual impairment.

Origin

The dorsal artery of the penis is a terminal branch of the internal pudendal artery, arising at the inferior border of the symphysis pubis.

It passes between the crus penis and the pubic symphysis of the pelvis to reach the dorsal surface of the corpus cavernosus penis.
As it pierces the perineal membrane, it passes between the two layers of the suspensory ligament of the penis, or pierces the lateral lamina of the suspensory ligament of penis.
It passes distally along the dorsum of the penis to reach the base of the glans penis. In the dorsum of the penis, it passes in between the deep dorsal vein of penis and dorsal nerve of penis ; it is situated superficial to the deep dorsal vein of penis.

At the base of the glans penis, it anastomoses with its contralateral counterpart to form an arterial circle which supplies glans penis and foreskin.

It sends branches through the fibrous sheath of the corpus cavernosum penis to anastomose with the deep artery of the penis. It anastomoses with the artery of bulb of penis. It terminates by anastomosing with its contralateral partner.

The dorsal artery of the penis supplies the skin and fascia of the penis including the foreskin, the corpus cavernosum penis, and the the glans penis.
Its superficial collateral branches are distributed to the integuments of the penis. It gives deep/perforating collateral branches to the corpus cavernosum penis. Through retrograde flow it helps supply the skin of the distal shaft. It also gives branches to the circumflex arteries that supply the corpus spongiosum.