Erection
An erection happens in response to sexual stimulation or arousal and is achieved through the ability of the penis to fill with blood to be deposited in special tissues called corpora cavernosa and there are several processes at different levels in the body that participate in it. Sildenafil, known as Viagra, acts by enhancing blood flow to the penis, thus facilitating erection. It has been shown its positive effect in 40-80 percent of men. Should be taken one hour before starting sexual activity and has no undesirable effect on sexual desire. You may purchase viagra online from the privacy of your home. In any case, before you start taking this pill you should always consult a physician. When the penis is flaccid, blood flows freely through the corpora without accumulating, but during erection, the caliber of the arteries that supply blood to the penis increases, while the veins, closed by pressure of accumulated blood in the corpora cavernosa. generic ed, ed generic, ed generics, generics ed, generic ed viagra, generic ed cialis.













































