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Viagra® is one of the best-known drugs of all time and this is no secret.
Pfizer has spent untold millions of dollars advertising Viagra®, so you see advertisements for the drug constantly on TV and can be seen on sporting events and all sorts of entertainment. Generic Viagra
Pfizer claims on its Web site that nine Viagra pills are dispensed every second nearly 300 million tablets per year.
The name recognition of Viagra® is so good that nearly every adult in America has heard of the drug and can tell you what it does. What Viagra® does is simple: When it works as intended, Viagra® causes a man who is sexually stimulated to get an erection., full of blood in the penis. Generic Viagra
How does Viagra do that? Cialis Levitra Tadalafil And why does Viagra work only if the man is sexually stimulated? For that matter, what causes an erection in the first place? In this article, we'll answer all of those questions and more. Generic Viagra Works
The human body and the techniques that scientists use to control different parts of the body with drugs. And in the case of Sildenafil and Generic Viagra, the story starts with the technology of the penis of the human man.
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Probably the easiest way to understand how the penis becomes erect is to think about a balloon. If a balloon has no air in it, it is limp. As you inflate a limp balloon with just a little air, it becomes elongated and rigid.
The penis uses a similar mechanism, but instead of using pressurized air to become rigid, the penis uses pressurized blood. The penis contains two cigar-shaped structures, called corpora cavernosa (singular - corpus cavernosum), that it uses to become erect.
In a non-erect state, the arteries that bring blood into the corpora cavernosa are somewhat constricted, while the veins that drain the blood from the penis are open. There is no way for pressure to build inside the penis. In this state, the penis is limp.
When a man becomes aroused, the arteries leading into the penis open up so that pressurized blood can enter the penis quickly. The veins leaving the penis constrict. Pressurized blood is trapped in the corpora cavernosa, and this blood causes the penis to elongate and stiffen. The penis is erect.