A Step-by-Step Guide to the Mechanics of Male Arousal
Brain processes stimulus and signals pelvic nerves. Nitric Oxide (NO) is released, commanding smooth muscles to relax.
Arteries dilate significantly. High-volume blood rushes into the spongy corpora cavernosa chambers, causing expansion (tumescence).
Expanding tissue compresses exit veins against the tough outer sheath. Blood is trapped under pressure, creating rigidity.
Continuous signals and healthy cardiovascular flow maintain pressure and oxygenation balanced against minute outflow.
Signals cease. Enzyme PDE5 breaks down relaxants. Muscles contract, veins open, and blood drains back to flaccid state.