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| The ''penis'' is the male copulatory organ, and, in mammals, the male organ of urinary excretion. | The ''penis'' is the male copulatory organ, and, in mammals, the male organ of urinary excretion. It is homologous (develops from the same embryonic structure) as the female ]. | ||
| The penis is built of three columns of erectile ]: | The penis is built of three columns of erectile ]: | ||
| * the two corpora cavernosa and | * the two ] and | ||
| * one corpus spongiosum which lies below them. | * one ] which lies below them. | ||
| The end of corpus spongiosum is enlarged and cone-shaped and forms so called | The end of corpus spongiosum is enlarged and cone-shaped and forms so called ]. | ||
| ]. | |||
| Erection is achieved by influx of blood into a |
Erection is achieved by influx of blood into a labyrinth of ]s. The vessels are distended and reflex muscle contraction around veins traps blood in vessels of erectile tissue. (When this mechanism fails to function properly, the result is ].) | ||
| vessels are distended and reflex muscle contraction around veins traps blood in | |||
| vessels of erectile tissue. | |||
| The ] that is the last part of urinary tract traverses the corpus | The ] that is the last part of urinary tract traverses the corpus spongiosum and its end lies on the tip of the ]. Apart from being a passage for ] it also is for ] ejaculation. | ||
| spongiosum and its end lies on the tip of the ]. Apart from being | |||
| a passage for ] it also is for ] ejaculation. | |||
| A loose fold of skin partly covering the glans is called the foreskin or ]. ] is the cutting off of this fold of skin. Many societies have practiced circumcision on religious or cultural grounds (For example, circumcision, or ], is one of the basic requirements of male ]). In the modern USA, male infants are commonly circumcised on the grounds that the circumcised condition is healthier. Controversy about the truth of this assertion continues. | |||
| A loose fold of skin partly covering the glans is called ]. | |||
| Related subjects : ], ], ], | Related subjects : ], ], ], ]; ]; ]. | ||
| ]; ]; ]. | |||
| /Talk | |||
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| Is this true of all penises, or just human penises? If human only, should this be a subcategory under ]? | |||
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| This architecture is common to the penises of a great many animals, and almost universal among mammals, with the exception of the prepuce (or foreskin). In addition, however, some animals have additional features such as the os penis in dogs (penile bone) and such. The '''precise''' description above is only human. | |||
Revision as of 00:29, 8 November 2001
The penis is the male copulatory organ, and, in mammals, the male organ of urinary excretion. It is homologous (develops from the same embryonic structure) as the female clitoris.
The penis is built of three columns of erectile tissue:
- the two corpora cavernosa and
- one corpus spongiosum which lies below them.
The end of corpus spongiosum is enlarged and cone-shaped and forms so called glans penis.
Erection is achieved by influx of blood into a labyrinth of blood vessels. The vessels are distended and reflex muscle contraction around veins traps blood in vessels of erectile tissue. (When this mechanism fails to function properly, the result is impotence.)
The urethra that is the last part of urinary tract traverses the corpus spongiosum and its end lies on the tip of the glans penis. Apart from being a passage for urine it also is for semen ejaculation.
A loose fold of skin partly covering the glans is called the foreskin or prepuce. Circumcision is the cutting off of this fold of skin. Many societies have practiced circumcision on religious or cultural grounds (For example, circumcision, or briss, is one of the basic requirements of male Jews). In the modern USA, male infants are commonly circumcised on the grounds that the circumcised condition is healthier. Controversy about the truth of this assertion continues.
Related subjects : impotence, priapism, circumcision, sexual intercourse; clitoris; vagina.
/Talk