corpus cavernosum

(redirected from Corpora cavernosa penis)
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corpus

 [kor´pus] (pl. cor´pora) (L.)
body.
corpus al´bicans white fibrous tissue that replaces the regressing corpus luteum in the human ovary in the latter half of pregnancy, or soon after ovulation when pregnancy does not supervene.
corpus amygdaloi´deum amygdaloid body.
cor´pora amyla´cea small hyaline masses of degenerate cells found in the prostate, neuroglia, and other sites.
corpus callo´sum an arched mass of white matter in the depths of the longitudinal fissure, made up of transverse fibers connecting the cerebral hemispheres.
corpus caverno´sum either of the two columns of erectile tissue forming the body of the penis or clitoris.
corpus fimbria´tum a band of white matter bordering the lateral edge of the lower cornu of the lateral ventricle of the brain.
corpus genicula´tum see geniculate bodies, lateral, and geniculate bodies, medial.
corpus hemorrha´gicum
1. an ovarian follicle containing blood.
2. a corpus luteum containing a blood clot.
3. a blood clot formed in the cavity left by rupture of a graafian follicle.
corpus lu´teum a yellow glandular mass in the ovary formed by an ovarian follicle that has matured and discharged its ovum; see also ovulation.
corpus mammilla´re mamillary body.
cor´pora quadrige´mina four rounded eminences on the posterior surface of the mesencephalon.
corpus spongio´sum pe´nis a column of erectile tissue forming the urethral surface of the penis, in which the urethra is found.
corpus ster´ni body of sternum.
corpus stria´tum a subcortical mass of gray matter and white matter in front of and lateral to the thalamus in each cerebral hemisphere.
corpus u´teri that part of the uterus above the isthmus and below the orifices of the fallopian tubes.

corpus cavernosum

Etymology: L, body + caverna hollow place
a type of spongy erectile tissue within the penis or clitoris. The tissue becomes engorged with blood during sexual excitement.

corpus cavernosum

Either of two cylindrical columns of spongy tissue that run superolaterally to the corpus spongiosum over the length of the penis. Mechanical stimulation of the penis triggers the parasympathetic division of the autonomic nervous system with minimal input from the central nervous system, releasing acetylcholine from the sacral nerves, which in turn releases nitric oxide from the endothelial cells of the trabecular arteries, resulting in vasodilation and engorgement of the corpora cavernosa with blood and an erection. When the parasympathetic stimulation subsides, the corpora cavernosa return to a relaxed state.

corpus cavernosum

one of a pair of laterally situated masses of erectile tissue in the mammalian penis which, together with the CORPUS SPONGIOSUM, causes the erection of the penis when filled with blood.

Corpus cavernosum (plural, corpora cavernosa)

One of two rods of spongy tissue in the penis that become engorged with blood in order to produce an erection.
Mentioned in: Impotence