Erection Anatomy

The human penis is anatomically divided into two continuous areasthe body or external portion and the root. Two main arteries one in each of the corpora cavernosa and several veins move blood in and out.

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The blood then gets trapped under high pressure creating an erection.

Erection anatomy. Anatomy of the erect penis. Penis anatomy pictures images and stock photos browse 594 penis anatomy stock photos and images available or start a new search to explore more stock photos and images. During erection the ridged band forms ridges that go all the way around about halfway down the shaft.

There are several different parts to the penis each of which has some impact on feeling sexual arousal and pleasure. How does an erection occur. The root of the penis begins directly below the bulbourethral glands with a long cylindrical body of tissue known as the corpus spongiosum or corpus cavernosum urethrae.

The root and body of the penis are spanned by three masses of erectile tissue. During sexual arousal nerve messages begin to stimulate the penis. The reddish or purplish glans or glans penis head of the penis is smooth shiny moist and extremely sensitive.

The urethra the tube that urine and semen flow through runs along the underside of them in the spongy tissue of the corpus spongiosum. Another functioning part of the anatomy of the penis is called corpus spongiosum. The erectile tissues fill with blood during sexual arousal producing an erection.

Unlike the corpus cavernosum this portion of the anatomy of the penis also works to keep the urethra open during an erection. There is a lot of variation in penis size although size has nothing to do with how well a penis is working or how much pleasure someone with that penis can give or receive. The root and body of the penis are spanned by three masses of erectile tissue.

When the blood vessels of the corpora cavernosa relax and open up blood rushes in through the cavernosus arteries to fill them. Anatomy of a penis. This spongy tissue inside of the shaft also helps to produce an erect penis.

They have a maze of blood vessels tissue and open pockets. An erection begins with sensory and mental stimulation. The corpus spongiosum in the middle of the penis houses the urethra the opening at the end of the penis through which a man urinates and ejaculates.

There is also a network of tissues muscles arteries and veins running through the penis which allows it to fill with blood and stiffen for an erection. The primary physiological mechanism that brings about erection is the autonomic dilation of arteries supplying blood to the penis which allows more blood to fill the three spongy erectile tissue chambers in the penis causing it to lengthen and stiffen. The now engorged erectile tissue presses against and constricts the veins that carry blood away from the penis.

Erection Human Anatomy And Physiology Lecture Notes