The side-by-side cylinders in the male penis that stiffen during arousal are the

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The corpora cavernosa are the two parallel cylinders that run the length of the penis and fill with blood during male arousal, causing the penis to become erect. The corpus spongiosum is a single cylinder located beneath the corpora cavernosa, which surrounds the urethra and helps to maintain its patency during erection. The muscles of the penis are responsible for controlling the movement of the penis during sexual activity, while the glans penis is the head of the penis, located at the end of the shaft.

The Side-By-Side Cylinders in the Male Penis That Stiffen During