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Lateral cross section of the penis. Three main parts of the human penis include: Root: It is the attached part, consisting of the bulb in the middle and the crura, one crus on either side of the bulb. It lies within the superficial perineal pouch. The crus is attached to the pubic arch. Shaft: The pendulous part of the penis. It has two ...
Flaccid penis length can sometimes be a poor predictor of erect length. An adult penis that is abnormally small but otherwise normally formed is referred to in medicine as a micropenis. A large, uncircumcised human penis, flaccid and erect. Flaccid length is a poor predictor for erect length.
A penis (/ ˈ p iː n ɪ s /; pl.: penises or penes) is a male sex organ that is used to inseminate female or hermaphrodite animals during copulation. [1] [2] Such organs occur in both vertebrates and invertebrates, including humans, but not in all male animals. [3] The term penis applies to many intromittent organs, but not to all.
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, although erections can also be spontaneous.
In male human anatomy, the glans penis or penile glans, [1] commonly referred to as the glans, (/ ɡ l æ n z /; from Latin glans meaning "acorn") [2] is the bulbous structure at the distal end of the human penis that is the human male's most sensitive erogenous zone and primary anatomical source of sexual pleasure.
The common specific name is derived from the Latin vagina, originally meaning "sheath, scabbard, covering; sheath of an ear of grain, hull, husk." [4] The specific epithet may refer to a sheathed trait or habit of an organism (e.g. Alysicarpus vaginalis), or may refer to resemblance/relation to the vagina (e.g. Gardnerella vaginalis) [5]
Inside the penis is the urethra, which is used to ejaculate semen and to excrete urine. Both substances exit through the meatus . When a male becomes sexually aroused , erection occurs because sinuses within the erectile tissues of the penis ( corpora cavernosa and corpus spongiosum ) become filled with blood.
The male external urethral orifice is the external opening of the urethra, normally located at the tip of the glans penis, [1] at its junction with the frenular delta. It presents as a vertical slit, possibly bounded on either side by two small labia-like projections, and continues longitudinally along the front aspect of the glans, which ...