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The rounded base of the glans is called the corona. The area on the underside of the penis, where the foreskin is attached, is called the frenum, or frenulum.

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The enlarged and bulbous-shaped end of the corpus spongiosum forms the glans penis with two specific types of sinusoids, which supports the foreskin, or prepuce, a loose fold of skin that in adults can retract to expose the glans.

The proximal parts of the corpus spongiosum form the bulb of penis and the distal ends form the glans penis. The corpus spongiosum is an erectile tissue surrounding the urethra. The crus of penis is the proximal parts of the corpora cavernosum. The corpus cavernosum forms most of the penis and contains blood vessels that fill with blood to help make an erection. The human penis is made up of three columns of tissue: two corpora cavernosa lie next to each other on the dorsal side and one corpus spongiosum lies between them on the ventral side.

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The epithelium is not attached to the underlying shaft so it is free to glide to and fro.

Epithelium of the penis consists of the shaft skin, the foreskin, and the preputial mucosa on the inside of the foreskin and covering the glans penis.

The base of the body of penis is supported by the suspensory ligament which is attached to the pubic symphysis. The ventral surface is marked by the penile raphe. It has two surfaces: dorsal (posterosuperior in the erect penis), and ventral or urethral (facing downwards and backwards in the flaccid penis).

Body of the penis (corpus): The pendulous part of the penis.

The crus of penis is attached to the pubic arch. It lies within the superficial perineal pouch.

Root of the penis (radix): It is the attached part, consisting of the bulb of penis in the middle and the crus of penis, one on either side of the bulb.

There are several common body modifications to the penis, including circumcision and piercings.Īnatomy Lateral cross section of the penis Parts Neither age nor size of the flaccid penis accurately predicts erectile length. As of 2015, the average erect human penis is 13.12 cm (5.17 in) long and has a circumference of 11.66 cm (4.59 in). An erect penis may be straight or curved and may point at an upward angle, a downward angle, or straight ahead. In its fully erect state, the corpus becomes rigid and the glans becomes engorged but not rigid. In its flaccid state the penis is smaller, gives to pressure, and the glans is covered by the foreskin. Erections can occur in non-sexual situations spontaneous non-sexual erections frequently occur during adolescence and sleep. An erection is the stiffening expansion and orthogonal reorientation of the penis, which occurs during sexual arousal. The skin around the penis and the urethra share the same embryonic origin as the labia minora in females.

Most of the penis develops from the same embryonic tissue as the clitoris in females. It is a passage both for urination and ejaculation of semen ( see male reproductive system). The urethra traverses the corpus spongiosum, and its opening, the meatus ( / m iː ˈ eɪ t ə s/), lies on the tip of the glans penis. The human male urethra passes through the prostate gland, where it is joined by the ejaculatory duct, and then through the penis. The body of the penis is made up of three columns of tissue: two corpora cavernosa on the dorsal side and corpus spongiosum between them on the ventral side. The main parts are the root (radix) the body (corpus) and the epithelium of the penis including the shaft skin and the foreskin (prepuce) covering the glans penis. In human anatomy, the penis ( / ˈ p iː n ɪ s/ PL: penises or penes from the Latin pēnis, initially "tail" ) is an external male intromittent organ that additionally serves as the urinary duct.