Wikia

Psychology Wiki

Changes: Corpus cavernosum penis

Edit

Back to page

m (Reverted edits by 213.52.216.196 (talk) to last version by Charitwo)
 
Line 20: Line 20:
   
 
==Anatomy==
 
==Anatomy==
The two corpora cavernosa and [[corpus spongiosum penis|corpus spongiosum]] (also kno
+
The two corpora cavernosa and [[corpus spongiosum penis|corpus spongiosum]] (also known as the corpus cavernosum urethrae in older texts and in the diagram to the right) are three expandable erectile tissues along the length of the [[penis]] which fill with [[blood]] during [[penile erection]]. The two corpora cavernosa lie along the penis shaft, from the pubic bones to the head of the penis, where they join. These formations are made of a sponge-like tissue containing irregular blood-filled spaces lined by [[endothelium]] and separated by [[connective tissue]] [[Septum|septa]].
  +
  +
The male anatomy has no [[vestibular bulbs]], but instead a [[corpus spongiosum]], a smaller region along the bottom of the penis, which contains the [[urethra]] and forms the glans penis.
  +
  +
==Physiology==
  +
In some circumstances, release of [[nitric oxide]] precedes relaxation of muscles in the corpora cavernosa and corpus spongiosum, in a process similar to female arousal. The spongy tissue fills with blood, from arteries down the length of the penis. A little blood enters the corpus spongiosum; the remainder engorges the corpora cavernosa, which expand to hold 90% of the blood involved in an erection, increasing both in length and in diameter. The function of the corpus spongiosum is to prevent compression of the urethra during erection.
  +
  +
Blood can leave the erectile tissue only through a drainage system of veins around the outside wall of the corpus cavernosum. The expanding spongy tissue presses against a surrounding dense tissue ([[tunica albuginea]]) constricting these veins, preventing blood from leaving. The penis becomes rigid as a result. The [[glans penis]], the expanded cap of the corpus spongiosum, remains more malleable during erection because its tunica albuginea is much thinner than elsewhere in the penis.
  +
  +
<br clear="right" />
  +
==Additional images==
  +
<gallery>
  +
Image:Illu penis.jpg|Structure of the penis
  +
Image:Gray543.png|The deeper branches of the internal pudendal artery.
  +
Image:Gray588.png|The penis in transverse section, showing the bloodvessels.
  +
Image:Gray1136.png|Male pelvic organs seen from right side.
  +
Image:Gray1158.png|Diagram of the arteries of the [[penis]].
  +
</gallery>
  +
  +
==References==
  +
{{reflist}}
  +
  +
==External links==
  +
* {{SUNYAnatomyLabs|42|st|11|02}} - "The Male Perineum and the Penis: Penis"
  +
* {{eMedicineDictionary|corpus+cavernosum+penis}}
  +
* {{eMedicineDictionary|corpus+cavernosum+urethrae}}
  +
*[http://www.naturalpenisenlarge.org/ Natural Penis Enlargement Myths]
  +
  +
{{Male reproductive system}}
  +
  +
<!--
  +
[[br:Corpus cavernosum penis]]
  +
[[bg:Пещеристо тяло]]
  +
[[cs:Topořivé těleso]]
  +
[[es:Cuerpos cavernosos]]
  +
[[fr:Corps caverneux]]
  +
[[io:Kavernala korpo]]
  +
[[it:Corpo cavernoso]]
  +
[[ja:海綿体]]
  +
[[pl:Ciała jamiste]]
  +
[[pt:Corpo cavernoso]]
  +
[[ru:Пещеристое тело]]
  +
[[simple:Corpus cavernosum penis]]
  +
[[zh:海綿體]]
  +
-->
  +
{{enWP|Corpus cavernosum penis}}
 
[[Category:Andrology]]
 
[[Category:Andrology]]
 
[[Category:Penis]]
 
[[Category:Penis]]

Latest revision as of 07:17, March 31, 2010

Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual differences | Personality | Philosophy | Social |
Methods | Statistics | Clinical | Educational | Industrial | Professional items | World psychology |

Biological: Behavioural genetics · Evolutionary psychology · Neuroanatomy · Neurochemistry · Neuroendocrinology · Neuroscience · Psychoneuroimmunology · Physiological Psychology · Psychopharmacology (Index, Outline)


Corpus cavernosum penis
Transverse section of the penis.
Latin corpus cavernosum penis
Gray's subject #262 1248
System
MeSH [1]
The constituent cavernous cylinders of the penis.

The corpus cavernosum penis is one of a pair of sponge-like regions of erectile tissue which contain most of the blood in the penis during penile erection. This is homologous to the corpus cavernosum clitoridis in the female; the body of the penis contains erectile tissue in a pair of corpora cavernosa (literally "cave-like bodies"), with a recognisably similar structure.

AnatomyEdit

The two corpora cavernosa and corpus spongiosum (also known as the corpus cavernosum urethrae in older texts and in the diagram to the right) are three expandable erectile tissues along the length of the penis which fill with blood during penile erection. The two corpora cavernosa lie along the penis shaft, from the pubic bones to the head of the penis, where they join. These formations are made of a sponge-like tissue containing irregular blood-filled spaces lined by endothelium and separated by connective tissue septa.

The male anatomy has no vestibular bulbs, but instead a corpus spongiosum, a smaller region along the bottom of the penis, which contains the urethra and forms the glans penis.

PhysiologyEdit

In some circumstances, release of nitric oxide precedes relaxation of muscles in the corpora cavernosa and corpus spongiosum, in a process similar to female arousal. The spongy tissue fills with blood, from arteries down the length of the penis. A little blood enters the corpus spongiosum; the remainder engorges the corpora cavernosa, which expand to hold 90% of the blood involved in an erection, increasing both in length and in diameter. The function of the corpus spongiosum is to prevent compression of the urethra during erection.

Blood can leave the erectile tissue only through a drainage system of veins around the outside wall of the corpus cavernosum. The expanding spongy tissue presses against a surrounding dense tissue (tunica albuginea) constricting these veins, preventing blood from leaving. The penis becomes rigid as a result. The glans penis, the expanded cap of the corpus spongiosum, remains more malleable during erection because its tunica albuginea is much thinner than elsewhere in the penis.


Additional imagesEdit

ReferencesEdit

External linksEdit


This page uses Creative Commons Licensed content from Wikipedia (view authors).

Around Wikia's network

Random Wiki