Information AboutPenis |
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Linguistics Etymology The word is derived from a Latin word for ''tail'', also used to describe the organ, ''"penis"''. The Latin word ''"phallus"'' (from the Greek ''"φαλλος"'') is sometimes used to describe the penis, though the word originally was used to describe ''images'', pictoral or carved, of the penis {Link without Title} .
Human penis The human penis differs from those of some other mammals. It has no Baculum , or erectile bone; instead it relies entirely on engorgement with blood to reach its erect state. It cannot be withdrawn into the groin, and is larger than average in the animal kingdom in proportion to body mass. Structure The human penis is made up of three columns of erectile Tissue :
The corpus spongiosum lies on the underside (known also as the Ventral Side ) of the penis; the two corpora cavernosa lie next to each other on the upper side ( Dorsal Side ). The end of the corpus spongiosum is enlarged and cone-shaped and forms the Glans Penis . The glans supports the Foreskin or prepuce, a loose fold of skin that in adults can retract to expose the glans. The area on the underside of the penis, where the foreskin is attached, is called the Frenum (or frenulum). The Urethra , which is the last part of the Urinary Tract , traverses the corpus spongiosum and its opening, known as the Meatus , lies on the tip of the glans penis. It is both a passage for Urine and for the Ejaculation of Semen . Sperm is produced in the Testes and stored in the attached Epididymis . During ejaculation, sperm are propelled up the Vas Deferens , two ducts that pass over and behind the bladder. Fluids are added by the Seminal Vesicle s and the vas deferens turns into the Ejaculatory Duct s which join the urethra inside the Prostate Gland . The prostate as well as the Bulbourethral Gland s add further secretions, and the semen is expelled through the penis. The Raphe is the visible ridge between the Lateral halves of the penis, found on the Ventral or under side of the penis, running from the meatus (opening of the urethra) across the scrotum to the Perineum (area between scrotum and anus). Sexual homology See Also: Sexual homology In short, this is a known list of sex organs that evolve from the same tissue in a human life. The Glans of the penis is Homologous to the Clitoral Glans , the corpora cavernosa are homologous to the body of the clitoris, the corpus spongiosum is homologous to the Vestibular Bulbs beneath the labia minora, the scrotum is homologous to the Labia Minora and Labia Majora , and the foreskin homologous to the Clitoral Hood . The raphe does not exist in females, because there the two halves are not connected. Erection See Also: Erection ).]] An erection is the stiffening and rising of the penis, which occurs in the Sexually Aroused male, though it can also happen in non-sexual situations. 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. More blood enters the penis than leaves until an equilibrium is reached (equal volume of blood flowing into the dilated arteries and out of the constricted veins). A constant erectile size is achieved at equilibrium. Erection facilitates Sexual Intercourse though it is not essential for some other Sexual Activities . Although many erect penises point upwards (see illustration), it is common and normal for the erect penis to point nearly vertically upwards or nearly vertically downwards, depending on the tension of the suspensory ligament that holds it in position. Stiffness or erectile angle also varies. Size See Also: Human penis size As a general rule, an penis is larger than that of the common chimpanzee, both proportional to body size and in absolute terms. While results vary across studies, the general consensus is that the average human penis is approximately 14.5 cm (5.7 inches) in length and 12.7 cm (5 in) in circumference when fully engorged with blood during Arousal . According to a survey of 1,500 men that claimed that average size was long 15 cm by 12.7 cm around (5.9-5 in), the most common size was 14.6 cm (5.75 inches) and 78% of men had erect penises between 13.3 and 17.1 cm (5.25-6.75 in). It also said 13.3 cm (5.25 inches) was the most common girth, with 78.4% measuring between 12.1 and 14 cm around (4.75 and 5.5 in). As with any other bodily attribute, the length and girth of the penis is highly variable between individuals of the same species. In many animals, especially Mammal s, the size of a flaccid penis is much smaller than its erect size. In humans and some other species, flaccid vs. erect penis size varies greatly between individuals, such that penis size when flaccid is not a reliable predictor of size when erect. Except for extreme cases at either end of the size spectrum, penis size does not correspond strongly to reproductive ability in almost any species. THe normal size is 12. inches. if your penis is not at least 10 your are not normal!!! you should go get that checked out. Altering the male genitalia See Also: Genital modification and mutilation The most prevalent form of genital alteration in some countries is and part of the shaft skin is also removed. Less commonly, the penis is sometimes Pierced or decorated by other Body Art . Such alterations are almost universally elective and usually for the purpose of aesthetics or increased sensitivity. Piercings of the penis include the Prince Albert Piercing , the Apadravya Piercing , the Ampallang Piercing , the Dydoe Piercing , and the Frenum Piercing . Foreskin Restoration or stretching is a further form of Body Modification . Other practices which alter the penis are also performed, although they are rare in Western societies without a diagnosed medical condition. Apart from a Penectomy , perhaps the most radical of these is Subincision , in which the urethra is split along the underside of the penis. Subincision originated among Australian Aborigine s, although it is now done by some in the U.S. and Europe. Non-human penises Most Marsupials , except for the two largest species of Kangaroo s, have a Bifurcated penis. That is, it separates into two columns, and so the penis has two ends. Urban Legend alleges that the Dolphin has Prehensile control over his penis (it is true, however, that whales and dolphins can move and to a certain degree bend their penis tips to facilitate mating). In the realm of absolute size, the smallest vertebrate penis belongs to the common shrew (5 mm or 0.2 inches). The largest penis belongs to the blue whale estimated at over 2 m (more than 6½ feet). Accurate measurements are difficult to take because the whale's erect length can only be observed during mating. Gorilla s have relatively small penises, so it is an often used subtle insult in some countries to insinuate or directly state that one is 'hung like a gorilla'. The Icelandic Phallological Museum is devoted entirely to collecting penis specimens from all the land and sea mammals living in Iceland . The museum has received a legally-certified gift token for a future specimen belonging to ''Homo sapiens''. Among birds, only Paleognathes ( Tinamous and Ratites ) and Anatidae (ducks, geese and swans) possess a penis. It is different in structure from mammal penes, being an erectile expansion of the Cloaca l wall and being erected by Lymph , not blood. It is usually partially feathered and in some species features spines and brush-like filaments, and in flaccid state curled up inside the cloaca. The Argentine Blue-bill has the largest penis in relation to body size of all vertebrates; while usually about half the body size (20 cm), a specimen with a remarkable 42.5 cm-long penis is documented. Male specimens of the '' Squamata '' order of reptiles have two paired organs called Hemipenes . In male Insect s, the structure homologous to a penis is known as Aedeagus . Cultural aspects involving penises Uses of animal penises
Uses of human penises in cultural traditions
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