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Anatomy of a penis: Understand the various parts of a penis, how you get an erection, and how an ejaculation actually happens.
An erection (clinically: penile erection or penile tumescence) is a physiological phenomenon in which the penis becomes firm, engorged, and enlarged. Penile erection is the result of a complex interaction of psychological, neural, vascular, and endocrine factors, and is often associated with sexual arousal , sexual attraction or libido ...
An erection is when your penis becomes hard and enlarged from an increase in blood flow. This increase in blood flow makes your penis stand up and away from your body (erect). Sexual stimulation or excitement is the typical cause of an erection. But people can get random or spontaneous erections.
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). [2][3] Neither age nor size of the flaccid penis accurately predicts erectile length. There are several common body modifications to the penis, including circumcision and piercings. The penis is homologous to the clitoris in females.
In this video, Jonathan Bennion from the Institute of Human Anatomy discusses the mechanism behind human erections.
The penis is the main part of external male genitalia, which has both sexual and bodily functions. It is able to ejaculate semen (containing sperm) during sex and to relieve the body of urine.
The process of achieving an erection involves several stages, including: Arousal. The first stage of an erection begins with sexual arousal, which can be triggered by physical or psychological stimuli. Before stimulation, the penis is soft – or flaccid.
The penis is an external organ of the male reproductive system. It has two main functions: Sexual intercourse – During erotic stimulation, the penis undergoes erection, becoming engorged with blood. Following emission, (mixing of the components of semen in the prostatic urethra) ejaculation can occur, whereby semen moves out of the urethra ...
In the United States, the average erect penis size is 5 to 7 inches long, with a circumference of about 4 inches and diameter (or width across) of up to 2 inches. Most flaccid penises range between 1 and 4 inches. This means some men gain a lot of length when they get an erection, while others gain an inch or two.
Erection, enlargement, hardening, and elevation of the male reproductive organ, the penis. Internally, the penis has three long masses of cylindrical tissue, known as erectile tissue, that are bound together by fibrous tissue. The two identical areas running along the sides of the penis are termed.