The male sex organ through which urine and semen pass. The penis consists mainly of 3 cylindrical bodies of erectile tissue (spongy tissue full of blood vessels) that run along its length. Two of these bodies, the corpora cavernosa, lie side by side along the upper part of the penis. The 3rd body, the corpus spongiosum, lies centrally beneath them and expands at the end to form the glans. Through the centre of the corpus spongiosum runs the urethra, a narrow tube that carries urine and semen out of the body through an opening at the tip of the glans. Around the erectile tissue is a sheath consisting of fibrous connective tissue enclosed by skin. Over the glans, the skin forms a fold called the foreskin.
Penis |
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