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Encyclopedia > Corpus cavernosum penis
Corpus cavernosum penis
Transverse section of the penis.
The constituent cavernous cylinders of the penis.
Latin corpus cavernosum penis
Gray's subject #262 1248
Dorlands/Elsevier c_56/12260417

A corpus cavernosum is one of a pair of a sponge-like regions of erectile tissue which contain most of the blood in the male penis during erection. There are corresponding structures and functions in the female clitoris. The term literally means "cave-like body" (plural: corpora cavernosa). Latin is an ancient Indo-European language. ... Elseviers logo Elsevier, the worlds largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. ... Erectile tissue is tissue in the body that can become erect, usually by becoming engorged with blood. ... Human blood smear: a - erythrocytes; b - neutrophil; c - eosinophil; d - lymphocyte. ... The penis (plural penises, penes) is an external male sexual organ. ... An erection of the penis occurs when two tubular structures that run the length of the penis, the corpora cavernosa, become engorged with venous blood. ... A womans clitoris extends from the visible portion to a point below the pubic bone. ...


The corpus cavernosum and corpus spongiosum are three expandable erectile tissues along the length of the penis which fill with blood during 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 corpus spongiosum is one smaller region along the bottom of the penis, which contains the urethra and forms the glans penis. The penis (plural penises, penes) is an external male sexual organ. ... Human blood smear: a - erythrocytes; b - neutrophil; c - eosinophil; d - lymphocyte. ... An erection of the penis occurs when two tubular structures that run the length of the penis, the corpora cavernosa, become engorged with venous blood. ... The endothelium is the layer of thin, flat cells that lines the interior surface of blood vessels, forming an interface between circulating blood in the lumen and the rest of the vessel wall. ... Connective tissue is any type of biological tissue with an extensive extracellular matrix and often serves to support, bind together, and protect organs. ... A septum, in general, is a wall separating two cavities or two spaces containing a less dense material. ... Female anatomy In anatomy, the urethra is a tube which connects the urinary bladder to the outside of the body. ...


In some circumstances, release of nitric oxide precedes relaxation of muscles in the corpora cavernosa and corpus spongiosum. 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. The chemical compound nitric oxide is a gas with chemical formula NO. It is an important signaling molecule in the body of mammals including humans, one of the few gaseous signaling molecules known. ...


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. The tunica albuginea is the tough fibrous covering of the testicles. ... The glans penis is the sensitive erectile tip of the penis. ...


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Reproductive system
Female - Cervix | Clitoris | Clitoral hood | Fallopian tubes | Bartholin's glands | G-spot | Hymen | Labium | Mammary glands | Ovaries | Skene's glands | Urethra | Uterus | Vagina | Vulva
Male - Urethra | Testes | Scrotum | Spermatic cord | Epididymis | Seminiferous tubules | Sertoli cell | Rete testis | Efferent ducts | Vas deferens | Seminal vesicles | Ejaculatory duct | Penis | Corpus cavernosum | Glans penis | Fundiform ligament | Foreskin | Frenulum | Prostate | Bulbourethral glands 

 
 

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