Erection
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| Erection | |
|---|---|
 Three columns o erectile tissue mak up maist o the volume o the penis. | |
| Anatomical terminology |
An erection (clinically: penile erection or penile tumescence) is a pheesiological phenomenon in which the penis acomes firmer, engorged an enlairged. Penile erection is the result o a complex interaction o psychological, neural, vascular an endocrine factors, an is often associatit wi sexual aroosal or sexual attraction, althou erections can an aa be spontaneous.