WordNet

a writing implement with a point from which ink flows
an enclosure for confining livestock
female swan
a collection of writings; "he edited the Hemingway corpus"
the main part of an organ or other bodily structure
the male organ of copulation (`member is a euphemism) (同)phallus, member

PrepTutorEJDIC

〈C〉(インクを用いる筆記具全体をさして)『ペン』;万年筆,ポールペン,フェルトペン;ペン先 / 〈U〉《the~》文筆,著述 / 〈C〉《単数形で》《文》文筆家 / 《気どって》…‘を'書く,著す(write)
〈C〉(家畜などを入れる)『おり』 / 《集合的に》ありの中の動物 / 〈C〉(監禁・保護に使われる)囲い,幼児用遊びわく(playpen) / (囲い・ありなどに)…‘を'入れる,閉じ込める,監禁する《+『名』+[『up』]『in』+『名』》
刑務所[penitentiaryの短縮形]
(特定の事に関する,または特殊の性質の)文書資料の集成 / (研究用に収集した)資料
陰茎,ペニス

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/08/01 02:22:00」(JST)

wiki en

A corpus cavernosum penis (singular) (cavernous body of the penis) is one of a pair of sponge-like regions of erectile tissue, the corpora cavernosa (plural) (cavernous bodies), which contain most of the blood in the penis during an erection. Such a corpus is homologous to the corpus cavernosum clitoridis in the female; the body of the clitoris contains erectile tissue in a pair of corpora cavernosa (literally "cave-like bodies") 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 connective tissue septa.^[1]^[2]

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

Structure of the penis
The deeper branches of the internal pudendal artery.
The penis in transverse section, showing the bloodvessels.
Male pelvic organs seen from right side.
Diagram of the arteries of the penis.
Cross section of penis.

References

^ "Embarrassing erections". 2007-01-17. Retrieved 2007-01-17.
^ "Understanding a man's erection". whitelotuseast.

External links

Anatomy photo:42:st-1102 at the SUNY Downstate Medical Center - "The Male Perineum and the Penis: Penis"

UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

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English Journal

Characterization of an outbreak of emerging bovine besnoitiosis in southwestern Spain.

Nieto-Rodríguez JM1, Calero-Bernal R2, Álvarez-García G3, Gutiérrez-Expósito D3, Redondo-García E4, Fernández-García JL5, Martínez-Estéllez MÁ1.
Parasitology research.Parasitol Res.2016 Jul;115(7):2887-92. doi: 10.1007/s00436-016-5050-1. Epub 2016 Apr 14.
Bovine besnoitiosis is an emerging disease in Europe, presenting quick spread toward central and southern Spain. Characterization of an outbreak in a free-ranging Limousin and Avileña beef cattle herd from southwestern Spain territories is attempted. Serological survey in the herd revealed increase
PMID 27075308

Testosterone modulates endothelial progenitor cells in rat corpus cavernosum.

Hwang I1, Lee HS1, Yu HS1, Kim ME2, Lee JS2, Park K1.
BJU international.BJU Int.2016 Jun;117(6):976-81. doi: 10.1111/bju.13438. Epub 2016 Feb 25.
OBJECTIVE: To investigate the effects of testosterone on cavernosal endothelial progenitor cells (EPCs) in a castrated rat model.MATERIALS AND METHODS: In all, 45 male Sprague-Dawley rats (12-weeks old) were divided into control, surgical castration, and castration with testosterone replacement grou
PMID 26823121

Sac-1004, a Pseudo-Sugar Derivative of Cholesterol, Restores Erectile Function through Reconstruction of Nonleaky and Functional Cavernous Angiogenesis in the Streptozotocin Induced Diabetic Mouse.

Batbold D1, Song KM1, Park JM1, Park SH1, Lee T1, Ryu DS2, Suh YG3, Kwon YG4, Ryu JK5, Suh JK6.
The Journal of urology.J Urol.2016 Jun;195(6):1936-46. doi: 10.1016/j.juro.2015.12.103. Epub 2016 Jan 23.
PURPOSE: We examined whether and how Sac-1004, a vascular leakage blocker, would restore erectile function in an animal model of diabetic erectile dysfunction.MATERIALS AND METHODS: Eight-week-old C57BL/6J mice were used. Diabetes was induced by intraperitoneal injection of streptozotocin. Eight wee
PMID 26812302

Japanese Journal

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泌尿器科紀要 = Acta urologica Japonica 61(3), 109-114, 2015-03
NAID 120005611366

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泌尿器科紀要 = Acta urologica Japonica 61(3), 115-119, 2015-03
NAID 120005611365

家族性大腸腺腫症に合併した陰嚢内デスモイド腫瘍の1例

泌尿器科紀要 = Acta urologica Japonica 61(1), 27-31, 2015-01
NAID 120005539308

Related Pictures

★リンクテーブル★

リンク元	「海綿体」「陰茎海綿体」
関連記事	「corpus cavernosum」「corpus」

「海綿体」

Corpus cavernosum penis
	Transverse section of the penis.
	The constituent cavernous cylinders of the penis.
Details
Identifiers
Latin	corpus cavernosum penis
Dorlands; /Elsevier	12260417
TA	A09.4.01.014
FMA	19618
	Anatomical terminology [edit on Wikidata]