22,311
edits
Changes
Jump to navigation
Jump to search
created from WP
[[File:Gray1155.png|thumb|Transverse section of the penis.]]
[[File:Gray1154.png|thumb|The constituent cavernous cylinders of the penis.]]
{{WikipediaQuote |URL=https://en.wikipedia.org/wiki/Corpus_cavernosum_penis |title=Corpus cavernosum penis}}
A '''corpus cavernosum penis''' (singular) (literally "cave-like body" of the penis, plural '''corpora cavernosa''') is one of a pair of sponge-like regions of [[erectile tissue]], which contain most of the [[blood]] in the [[penis]] during an [[erection]].<ref name="Lierse2012">{{REFbook
|last=Lierse
|first=Werner
|init=W
|title=Applied Anatomy of the Pelvis
|url=https://books.google.com/books?id=BGb7CAAAQBAJ&q=%22corpus+cavernosum%22+penis
|year=2012
|date=2012-12-06
|publisher=Springer Science & Business Media
|ISBN=978-3-642-71368-2
}}</ref><ref name="SchattenConstantinescu2008">{{REFbook
|last=Schatten
|first=Heide
|last2=Constantinescu
|first2=Gheorghe M.
|title=Comparative Reproductive Biology
|url=https://books.google.com/books?id=6iNdSk7gPf4C&q=%22corpus+cavernosum%22
|year=2008
|date=2008-03-21
|publisher=John Wiley & Sons
|ISBN=978-0-470-39025-2
}}</ref><ref name="Bertolotto2007">{{REFbook
|last=Bertolotto
|first=Michele
|title=Color Doppler US of the Penis
|url=https://books.google.com/books?id=Dz-0y7ozp4gC&q=%22corpus+%28cavernosum+OR+cavernosa%29%22&pg=PA157
|year=2007
|date=2007-12-22
|publisher=Springer Science & Business Media
|ISBN=978-3-540-36677-5
|pages=157–
}}</ref>
Such a corpus is homologous to the [[corpus cavernosum clitoridis]] in the female; the body of the [[clitoris]] that contains [[erectile tissue]] in a pair of corpora cavernosa with a recognisably similar structure.
==Anatomy==
The two corpora cavernosa and corpus spongiosum (also known as the ''corpus cavernosum urethrae'' in older texts and in the adjacent diagram) 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 trabeculae, irregular blood-filled spaces lined by endothelium and separated by septum of the penis.<ref>{{REFweb
|url=https://web.archive.org/web/20070102131713/http://www.thesite.org/sexandrelationships/sexuality/exploration/embarrassingerections
|archived=yes
|title=Embarrassing erections
|date=2007-01-17
|accessdate=2007-01-17
}}</ref><ref>{{REFweb
|url=http://www.whitelotuseast.com/Erection.htm
|title=Understanding a man's erection
|publisher=whitelotuseast
|date=2018-02
}}</ref>
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.
==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]].
Image:Penis_cross_section.svg|Cross section of penis.
File:Normal penis ultrasound.jpg|Medical ultrasonography of a normal penis.
</gallery>
{{REF}}
[[Category:Physiology]]
[[File:Gray1154.png|thumb|The constituent cavernous cylinders of the penis.]]
{{WikipediaQuote |URL=https://en.wikipedia.org/wiki/Corpus_cavernosum_penis |title=Corpus cavernosum penis}}
A '''corpus cavernosum penis''' (singular) (literally "cave-like body" of the penis, plural '''corpora cavernosa''') is one of a pair of sponge-like regions of [[erectile tissue]], which contain most of the [[blood]] in the [[penis]] during an [[erection]].<ref name="Lierse2012">{{REFbook
|last=Lierse
|first=Werner
|init=W
|title=Applied Anatomy of the Pelvis
|url=https://books.google.com/books?id=BGb7CAAAQBAJ&q=%22corpus+cavernosum%22+penis
|year=2012
|date=2012-12-06
|publisher=Springer Science & Business Media
|ISBN=978-3-642-71368-2
}}</ref><ref name="SchattenConstantinescu2008">{{REFbook
|last=Schatten
|first=Heide
|last2=Constantinescu
|first2=Gheorghe M.
|title=Comparative Reproductive Biology
|url=https://books.google.com/books?id=6iNdSk7gPf4C&q=%22corpus+cavernosum%22
|year=2008
|date=2008-03-21
|publisher=John Wiley & Sons
|ISBN=978-0-470-39025-2
}}</ref><ref name="Bertolotto2007">{{REFbook
|last=Bertolotto
|first=Michele
|title=Color Doppler US of the Penis
|url=https://books.google.com/books?id=Dz-0y7ozp4gC&q=%22corpus+%28cavernosum+OR+cavernosa%29%22&pg=PA157
|year=2007
|date=2007-12-22
|publisher=Springer Science & Business Media
|ISBN=978-3-540-36677-5
|pages=157–
}}</ref>
Such a corpus is homologous to the [[corpus cavernosum clitoridis]] in the female; the body of the [[clitoris]] that contains [[erectile tissue]] in a pair of corpora cavernosa with a recognisably similar structure.
==Anatomy==
The two corpora cavernosa and corpus spongiosum (also known as the ''corpus cavernosum urethrae'' in older texts and in the adjacent diagram) 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 trabeculae, irregular blood-filled spaces lined by endothelium and separated by septum of the penis.<ref>{{REFweb
|url=https://web.archive.org/web/20070102131713/http://www.thesite.org/sexandrelationships/sexuality/exploration/embarrassingerections
|archived=yes
|title=Embarrassing erections
|date=2007-01-17
|accessdate=2007-01-17
}}</ref><ref>{{REFweb
|url=http://www.whitelotuseast.com/Erection.htm
|title=Understanding a man's erection
|publisher=whitelotuseast
|date=2018-02
}}</ref>
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.
==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]].
Image:Penis_cross_section.svg|Cross section of penis.
File:Normal penis ultrasound.jpg|Medical ultrasonography of a normal penis.
</gallery>
{{REF}}
[[Category:Physiology]]