What is the Prostate

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The prostate is a small, squishy gland about the size of a walnut that sits under the bladder and in front of the rectum. The urethra, the narrow tube that runs the length of the penis and that carries both urine and semen out of the body, runs directly through the prostate; the rectum, or the lower end of the bowel, sits just behind the prostate and the bladder.