Corpus Cavernosum Penis

The corpus cavernosum penis is one of a pair of sponge-like regions of erectile tissue which contain most of the blood in the penis during penile erection. This is homologous to the corpus cavernosum clitoridis in the female; the body of the penis contains erectile tissue in a pair of corpora cavernosa (literally "cave-like bodies"), with a recognisably similar structure.

Read more about Corpus Cavernosum Penis:  Anatomy, Physiology, Additional Images

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