Penis

Penis (plural penises or penes) is a general term for the organs with which male and hermaphrodite animals introduce sperm into receptive females during copulation. Such organs occur in many animals, both vertebrate and invertebrate, but males do not bear a penis in every animal species, and in those species in which the male does bear a so-called penis, the penes in the various species are not necessarily homologous. For example, the penis of a mammal is at most analogous to the penis of a male insect or barnacle.

The term penis applies to many reproductive intromittent organs, but not to all; for example the intromittent organ of most cephalopoda is the hectocotylus, a specialised arm, and male spiders use their pedipalps.

In most species of animals in which there is an organ that might reasonably be described as a penis, it has no major function other than intromission, or at least conveying the sperm to the female, but in the placental mammals the penis bears the distal part of the urethra, which discharges both urine during urination and semen during copulation as the occasion requires. The Blue Whale has the largest penis of any organism on the planet, typically measuring 8-10 feet.

Read more about Penis:  Etymology

Other articles related to "penis":

Penis - Etymology
... The word "penis" is taken from the Latin word for "tail." Some derive that from Indo-European *pesnis, and the Greek word πέος = "penis" from Indo-European *pesos ... Prior to the adoption of the Latin word in English the penis was referred to as a "yard" ... of 1684, Steven Blankaart defined the word penis as "the Yard, made up of two nervous Bodies, the Channel, Nut, Skin, and Fore-skin, etc." As with nearly any aspect of the body involved in sexual or ...
Sexual Selection In Human Evolution - Sexual Dimorphism - Sexual Anatomy
... These include rounded breasts, facial hair, pubic hair and penis size ... Richard Dawkins has speculated that the loss of the penis bone in humans, when it is present in other primates, may be due to sexual selection by ... Homo also has by far the largest penis of the great apes, and this may be sexually selected in much the same way as the larger testicles of Pan ...
Small Penis Rule
... The "small penis rule" is an informal strategy used by authors to evade libel lawsuits ... Thus, he continued, libel lawyers have what is known as 'the small penis rule.' One way authors can protect themselves from libel suits is to say that a character has a small ... is going to come forward and say, 'That character with a very small penis, that's me!' " The small penis rule was referenced in a 2006 dispute between Michael Crowley and ...
Septum Of The Penis
... The corpora cavernosa penis are surrounded by a strong fibrous envelope consisting of superficial and deep fibers ... around each corpus, and form by their junction in the median plane the septum of the penis ...
Micropenis
... Micropenis is an unusually small penis ... of at least 2.5 standard deviations smaller than the mean human penis size, or smaller than about 7cm (3 inches) for an adult when compared to an average erection of 12.5cm (5 inches) ... The term is most often used medically when the rest of the penis, scrotum, and perineum are without ambiguity, such as hypospadias ...