![]() It regulates the amount of blood that enters so that the urethra can remain open. In contrast to the corpora cavernosa, the corpus spongiosum is a much more flexible body that does not become as rigid. It can be seen as a raised, vein-like column along the underside of the penis. As the erection develops, the corpus spongiosum fills with blood and allows the urethra to remain open so that ejaculate and other fluids can be released from the body. The corpus spongiosum also runs along the underside of the shaft and encircles the urethra. 2Īlso known as the spongy body, this tissue composes the glans of the penis. The corpora cavernosa can also become engorged with blood as a result of hormonal changes during the early stages of puberty. These bodies extend from the base of the shaft to the glans. Although there is an average value given to both length and girth, it is completely normal to have a variation.Īlso known as the cavernous bodies, the corpora cavernosa are two of the three chambers within the shaft of the penis that fill up with blood upon sexual arousal, thus causing an erection, as they are becoming firm and rigid. 3 Length and girth are variable and do not correspond directly to a change in sexual pleasure. It is made up of three parts: two corpora cavernosa and the corpus spongiosum, which all fill up with blood as the penis develops an erection. The shaft is the long, cylindrical part of the penis that connects the glans to the base. The corona is the piece of skin that separates the glans from the penis shaft and creates a ridge. Since the frenulum is so incredibly sensitive, sensations can range from intense feelings of pleasure to extreme discomfort, depending on the intensity and duration of stimulation. 1 It is considered to be one of the most sensitive places on the penis. The frenulum is the small strip of skin that runs from the glans to the shaft. 2 For example, if urine were leaving the penis, then ejaculate would be blocked, as the sphincter at the base of the urethra would not allow for those fluids to mix and exit the body simultaneously. 1 Other bodily fluids and secretions may exit the body via the urethra as a result of a sexually transmitted infection (STI). The urethral opening is the tiny slit at the top of the penis through which urine and ejaculate leave the body. The urethra also controls the type of fluid that is allowed to run out of the body via the urethral opening. There is also a sphincter within the urethra that controls the flow of fluids, just like a tightened muscle constricts blood flow. The structure within the urethra allows for urine to flow from the penis in a steady stream that is relatively easy to control. 1 The urethra allows urine from the bladder and ejaculate from the prostate, seminal vesicles, and testes to flow out of the body. The urethra runs through the corpus spongiusum. ![]() Smegma may increase the risk of a bacterial infection. ![]() If the glans under the foreskin is not cleaned properly, there is a chance that bacteria, dead skin, and oil, also known as smegma, will accumulate. 3 There is no scientific evidence to support the idea that foreskin adds to or detracts from sexual pleasure, but many parents wish to circumcise their male child as a religious rite or for increased hygiene. Many men receive a circumcision at birth, which means that the foreskin has been removed. Upon arousal and erection, the foreskin typically pulls back to expose the glans. The foreskin is a thin flap of skin that completely covers the glans unless it is pulled back. It contains 4,000 nerve endings, causing it to be highly sensitive to the touch. The glans, or head, of the penis is the cone-shaped structure at the tip of the penis. ![]()
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