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Effects
of Butea Superba
The process starts with the brain registering a sexual
stimulus. The brain then orchestrates a cascade of nerve
signals that run through the spinal cord to the penis.
Here, the cavernosal nerves release nitric oxide, a gas
that quickly penetrates the smooth muscle cells that form
the penis' spongy tissue. The nitric oxide causes the
cells to produce a substance called the cyclic guanine
mono phosphate (c GMP), which has an expansive, relaxing
effect.
The arteries feeding the penis expand and the smooth muscle
relaxes, opening up tiny sacs in the erectile tissue that
then swell with blood. The two main chambers of the penis,
the corpus cavernosum, fill and the organ becomes so engorged
that the veins that usually drain away blood are pressed
shut against the tough outer membrane of the erectile
chambers. The result is erection. Arteries [top] and veins
[bottom] penetrate the long, filled carities running the
length of the penis-the corpora cavernosa and the corpus
spongiosum. Erection occurs when relaxed muscles allow
the corpora cavernosa to fill with excess blood fed by
the arteries, while drainage of blood through the veins
is blocked.
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