Home Articles General How Does an Erection Occur

Polls

What kind of Insurance do you have?
 

How Does an Erection Occur

How does an erection occur?

The penis contains two chambers called the corpora cavernosa, which run the length of the organ (see figure 1). A spongy tissue fills the chambers. The corpora cavernosa are surrounded by a membrane, called the tunica albuginea. The spongy tissue contains smooth muscles, fibrous tissues, spaces, veins, and arteries. The urethra, which is the channel for urine and ejaculate, runs along the underside of the corpora cavernosa and is surrounded by the corpus spongiosum.

Erection begins with sensory or mental stimulation, or both. Impulses from the brain and local nerves cause the muscles of the corpora cavernosa to relax, allowing blood to flow in and fill the spaces. The blood creates pressure in the corpora cavernosa, making the penis expand. The tunica albuginea helps trap the blood in the corpora cavernosa, thereby sustaining erection. When muscles in the penis contract to stop the inflow of blood and open outflow channels, erection is reversed.

Two drawings of the penis: the top one showing the arteries of the penis and the bottom one showing the veins of the penis. The top drawing contains labels for the cavernous artery, dorsal artery, corpora cavernosa, bulbourethral artery, and corpus.

Figure 1. Arteries (top) and veins (bottom) penetrate the long, filled cavities 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.

 

Add comment


Security code
Refresh

Get a Penis Pump Today!

Encore Deluxe Kit

Get a Vacuum Erection Device

Fill out this form or call 1-866-422-4866


First Name*

Enter first name
Last Name*

Enter last name
Phone*

Enter phone number
Email Address

Enter email address



By submitting this form I authorize North Coast Medical Supply to contact me by telephone. Please be assured that we value and protect your privacy.
*No cost Ed Pump offer applies to qualified Medicare beneficiaries and dependent upon enrollment. Co-Pays and Deductibles may apply. Restrictions Apply. The information on this site is for informational purposes only and is not intended as a substitute for advice from your own physician or other health professional. You should not use the information contained on this site for diagnosing or treating a health problem or disease, or prescribing any medication. You should read carefully all product packaging. You should consult with a health care professional before starting any diet, exercise or supplementation program, before taking any medication, or if you have or suspect you might have a health problem.