Bulb of penis
The bulb of penis refers to the bottom portion of the penis. It is also known as the base of the penis. The bulb is composed of a large bundle of tissue. The tissue mass expands from the corpus spongiosum. The bulb is located above the scrotum, which is the protuberance that contains the testicles. In conjunction with five other components, the bulb forms the internal structure of the penis and the visible, external shape of the penis. The bulb appears as a prominent ridge on the shaft of the penis. Its corpus spongiform is attached to the perineal membrane that extends from the perineum. From the bulb, the corpus spongiform travels up the length of the penis along the urethra to form the glans at the top of the penis. The urethra extends from the bulb. The surface of the bulb is surrounded by bulbospongiosus muscle. The bulb of the vestibule, similar to the bulb of the penis, is present in women. The internal pudendal vein drains blood from the bulb while the internal pudendal artery supplies the bulb of penis with blood.
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In Depth: Bulb of penis