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What is the anatomy of a penis?

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The penis is the male sexual organ. The shaft is the longest part. At the end of it is the head, or glans. The opening at the tip of the head, where urine and semen come out, is called the meatus.

Inside, two cylinder-shaped chambers called the corpora cavernosa run the length of the penis. They have a maze of blood vessels, tissue, and open pockets.

The urethra, the tube that urine and semen flow through, runs along the underside of them, in the spongy tissue of the corpus spongiosum.

Two main arteries and several veins move blood in and out. Nerves relay messages to and from other parts of your body.

SOURCES:

National Institute of Diabetes and Digestive and Kidney Diseases.

Cleveland Clinic.

Reviewed by Melinda Ratini on November 15, 2017

SOURCES:

National Institute of Diabetes and Digestive and Kidney Diseases.

Cleveland Clinic.

Reviewed by Melinda Ratini on November 15, 2017

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