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corpus spongiosum

anatomy
Also known as: corpus cavernosum urethrae

Quick Summary

The corpus spongiosum is a cylindrical mass of erectile tissue in the penis that surrounds the urethra. It extends from the base to the tip of the penis, forming the glans penis. Unlike the corpora cavernosa, the corpus spongiosum does not become as fully erect because its veins are more peripheral, allowing for continuous blood outflow. This ensures the urethra remains open for the passage of urine and semen. The glans penis, formed by the corpus spongiosum, is highly sensitive due to its rich blood supply and numerous nerve endings, playing a key role in sexual arousal.12

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