domingo, 16 de mayo de 2010
martes, 11 de mayo de 2010
PENIS
The penis (plural penises, penes) is an external sexual organ of certain biologically male organisms, in both vertebrates and invertebrates.
The penis is a reproductive organ, technically an intromittent organ, and for placental mammals, additionally serves as the external organ of urination. The penis is generally found on mammals and reptiles.
The word "penis" is taken from the Latin word for "tail." Some derive that from Indo-European *pesnis, and the Greek word πεος = "penis" from Indo-European *pesos. Prior to the adoption of the Latin word in English the penis was referred to as a "yard". The Oxford English Dictionary cites an example of the word yard used in this sense from 1379, and notes that in his Physical Dictionary 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."
The Latin word "phallus" (from Greek φαλλος) is sometimes used to describe the penis, although "phallus" originally was used to describe images, pictorial or carved, of the penis.
The adjectival form of the word penis is penile. This adjective is commonly used in describing the male copulatory organ's various accessory structures that are commonly found in many kinds of invertebrate animals.
As with nearly any aspect of the human body that is involved in sexual or excretory functions, the word penis is considered funny from a juvenile perspective, and there are many slang words and euphemisms for the penis.
Erection angle
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 or even horizontally straight forward, all depending on the tension of the suspensory ligament that holds it in position. The following table shows how common various erection angles are for a standing male. In the table, zero degrees is pointing straight up against the abdomen, 90 degrees is horizontal and pointing straight forward, while 180 degrees would be pointing straight down to the feet. An upward pointing angle is most common.
The penis is a reproductive organ, technically an intromittent organ, and for placental mammals, additionally serves as the external organ of urination. The penis is generally found on mammals and reptiles.
The word "penis" is taken from the Latin word for "tail." Some derive that from Indo-European *pesnis, and the Greek word πεος = "penis" from Indo-European *pesos. Prior to the adoption of the Latin word in English the penis was referred to as a "yard". The Oxford English Dictionary cites an example of the word yard used in this sense from 1379, and notes that in his Physical Dictionary 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."
The Latin word "phallus" (from Greek φαλλος) is sometimes used to describe the penis, although "phallus" originally was used to describe images, pictorial or carved, of the penis.
The adjectival form of the word penis is penile. This adjective is commonly used in describing the male copulatory organ's various accessory structures that are commonly found in many kinds of invertebrate animals.
As with nearly any aspect of the human body that is involved in sexual or excretory functions, the word penis is considered funny from a juvenile perspective, and there are many slang words and euphemisms for the penis.
Erection angle
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 or even horizontally straight forward, all depending on the tension of the suspensory ligament that holds it in position. The following table shows how common various erection angles are for a standing male. In the table, zero degrees is pointing straight up against the abdomen, 90 degrees is horizontal and pointing straight forward, while 180 degrees would be pointing straight down to the feet. An upward pointing angle is most common.
Occurrence of Erection Angles
Angle (degrees) Percent
0–30 --------5
30–60 --------30
60–85 --------31
85–95 --------10
95–120------- 20
0–30 --------5
30–60 --------30
60–85 --------31
85–95 --------10
95–120------- 20
120–180 -------5