The fascinating mechanism of erection involves a factor called cGMP which is a vasodilator formed by the breakdown of GTP through the action of an enzyme called guanylyl cyclase. cGMP triggers the dilation of the blood vessels of the penis. The dilated penile vessels release blood out through the small openings created in the walls by dilation. The released blood fills the sinuses present in the spongy tissue, called carpus cavarnosa, of the penis. Filling of the sinuses with blood helps to build up pressure in the spongy tissue, which brings about erection. If due to any reason, sufficient blood does not fill carpus cavarnosa, erection will not be strong resulting in flaccid penis. Viagra strengthens erection by increasing the flow of blood to the sinuses of the spongy tissue of the penis.
How Viagra Helps Erection
