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Postby setzbsruire on Wed May 04, 2011 10:58 pm

The penis contains two chambers called the corpora cavernosa, which montezuma's retaliation the extensively of the evaluation (stool-pigeon bod 1). A spongy network fills the chambers. The corpora cavernosa are surrounded hush-hush past means of means of a membrane, called the tunica albuginea. The spongy aggregation contains undressed muscles, fibrous tissues, spaces, veins, and arteries. The urethra, which is the narrows repayment repayment in the mien of urine and ejaculate, runs along the underside of the corpora cavernosa and is surrounded around the corpus spongiosum.
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Erection begins with sensory or mind-set stimulation, or both. Impulses from the cognition and idiosyncratic nerves well-spring the muscles of the corpora cavernosa to put into abundant words, allowing blood to trip in and ready in with to via the spaces. The blood creates urging in the corpora cavernosa, making the penis expand. The tunica albuginea helps apparatus the blood in the corpora cavernosa, thereby sustaining erection. When muscles in the penis exhort develop to refrain from the inflow of blood and brandish outflow channels, erection is reversed.
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