Question

Penis

How does blood flow regulate penile erection?

A Answers (1)

  • A Dr. Mehmet Oz, MD, Cardiology (Cardiovascular Disease), answered
    Erection all begins with arousal (except while you sleep). Sexual stimulation triggers the release of nitric oxide, a chemical that causes smooth muscles lining blood vessels to relax. This makes the tiny blood vessels inside the penis's 2 chambers to fill with blood. At the same time, muscles tighten around veins to prevent blood from leaving. When more comes in and less goes out, the penis becomes engorged with blood causing it to get longer, wider and stiffer.
Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.
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