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| | Erection - Wikipedia, the free encyclopedia |
 | | The corpus spongiosum is a single tubular structure located just above the corpora carvernonosa, and contains the male urethra, through which urine and semen pass during urination and ejaculation, respectively. |
 | | The vessel system involved is known as the corpara cavernosa and the corpus spongiosum. |
 | | Some prescription drugs are injected directly into the corpus cavernosum or used as urethral suppositories, directly causing erection even in the absence of sexual excitation, while others, such as Viagra, Cialis, or Levitra are taken orally and support erection that is due to sexual excitation. |
| www.wikipedia.org /wiki/Erection (718 words) |
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