Corpora cavernosa
Corpora cavernosa (pronunciation: /ˈkɔːrpərə kævərˈnoʊsə/) is a pair of sponge-like regions of erectile tissue which contain most of the blood in the penis during an erection.
Etymology
The term "corpora cavernosa" originates from Latin, where "corpora" means "bodies" and "cavernosa" means "cavernous". The name is reflective of the structure's spongy appearance.
Anatomy
The corpora cavernosa are two cylinders of tissue that run parallel to each other along the top of the penis. Each cylinder is called a corpus cavernosum, and together they form the bulk of the erectile tissue of the penis. The corpora cavernosa are surrounded by a membrane, the tunica albuginea. The spongy tissue contains smooth muscles, fibrous tissues, spaces, veins, and arteries. The urethra, which is the channel for urine and ejaculate, runs along the underside of the corpora cavernosa.
Function
During sexual arousal, the brain releases chemicals that cause the corpora cavernosa to relax and fill with blood, which leads to the expansion and hardening of the penis, a state known as an erection. The blood is then trapped by the surrounding tunica albuginea, sustaining the erection.
Related Terms
- Erection: The state of the penis when it is filled with blood and stands away from the body.
- Erectile Dysfunction: A condition where a man is unable to achieve or maintain an erection.
- Penis: The male genital organ that carries the duct for the transfer of sperm during ejaculation.
- Urethra: The duct through which urine is discharged from the bladder in most mammals and through which semen is discharged in the male.
External links
- Medical encyclopedia article on Corpora cavernosa
- Wikipedia's article - Corpora cavernosa
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