Penis: The external reproductive organ of males. It is composed of a mass of erectile tissue enclosed in three cylindrical fibrous compartments. Two of the three compartments, the corpus cavernosa, are placed side-by-side along the upper part of the organ. The third compartment below, the corpus spongiosum, houses the urethra.1
Anatomical Information about Penis
The penis is a rod-shaped male reproductive organ that passes sperm and urine from the body. It contains two types of erectile tissue (spongy tissue with blood vessels that fill with blood to make an erection):
- Corpora cavernosa: The two columns of erectile tissue that form most of the penis.
- Corpus spongiosum: The single column of erectile tissue that forms a small portion of the penis. The corpus spongiosum surrounds the urethra (the tube through which urine and sperm pass from the body).
Source: NCI (NIH)2
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- Source: MeSH (U.S. National Library of Medicine)
- Source: NCI (NIH): cancer.gov/ types/ penile/ patient/ penile-treatment-pdq
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