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Arteries and veins of the penis. The penile artery (also known as the common penile artery) is the artery that serves blood to the penis. It is a terminal branch of the internal pudendal artery, along with the scrotal artery. It subdivides into three arteries, the bulbourethral artery, the dorsal artery of the penis and the cavernosal artery.
The deep artery of the penis one of the terminal branches of the internal pudendal artery. [citation needed] It arises from the internal pudendal artery posterior to the inferior edge of the symphysis pubis [1] while the internal pudendal artery is situated between the two fasciæ of the urogenital diaphragm (deep perineal pouch).
It passes between the crus penis [2] and the pubic symphysis [citation needed] of the pelvis to reach the dorsal surface of the corpus cavernosus penis. [2]As it pierces the perineal membrane, it (depending upon the source) passes between the two layers of the suspensory ligament of the penis, [citation needed] or pierces the lateral lamina of the suspensory ligament of penis.
After vasocongestion, the now-engorged erectile tissue presses against and constricts the veins that carry blood away from the penis. More blood enters than leaves the penis until an equilibrium is reached where an equal volume of blood flows into the dilated arteries and out of the constricted veins; a constant erectile size is achieved at ...
This keeps the artery coiled, and little blood flow occurs, instead routing to arteriovenous shunts to the deep dorsal vein. Parasympathetic stimulation removes the tonic state and allows vasodilation of the intimal cushion. Blood now pools in the corpora cavernosa, resulting in erection. The valves prevent backflow in the now-tortuous route ...
The superficial dorsal vein of the penis belongs to the superficial drainage system. It is located within the superficial dartos fascia, a continuation of the Colles' fascia, on the dorsal surface of the penis and, in contrast to the deep dorsal vein, it lies outside the deeper Buck's fascia. [2]
When a male becomes sexually aroused, erection occurs because sinuses within the erectile tissues of the penis (corpora cavernosa and corpus spongiosum) become filled with blood. The arteries of the penis are dilated while the veins are compressed so that blood flows into the erectile cartilage under pressure.
The increase of arterial flow during erection fills the erectile tissue with blood causing the glans to grow in size and sensitivity. [13] While the penis is rigid when erect, the glans itself remains slightly softer. [14] The soft cushiony texture of the glans absorbs impact during rigorous instances of copulation. [15]