Статьи Март 26th, 2009

• ERECTION: THE PENIS

  Дата: 2009.03.26 | Категории: ПСИХОЛОГИЧЕСКИЕ ТРУДНОСТИ ПРИ ДИАБЕТЕ | Комментарии: 0

  The penis is where erection all comes together, but the penis isn’t acting alone. Looking at one, it might be difficult to imagine that it contains thousands of tiny blood vessels and a sophisticated network of nerves. The mystery deepens when you consider that all this complicated biological machinery must work together to control the flow of blood which produces an erection,
  

  Long cylinders called the corpora cavernosa run down each side of the penis. These paired cylinders have to fill with blood for a man to obtain an erection. They are like long balloons: When pumped up with blood they are erect; when vacant, they are not erect. And they hold a lot of blood. When erect, the penis holds about eight times as much blood as when flaccid,
  

  A tube called the urethra runs along the bottom of the penis. The urethra carries sperm and urine, but not, thankfully, at the same time. When a man ejaculates, a valve between the urethra and the bladder closes off the bladder and allows only sperm to pass. Although some sperm may be washed out when a man urinates, in general the same sophisticated valve system prevents sperm from traveling down the urethra when a man is urinating.
  

  Surrounding the urethra is other spongelike tissue called the corpus spongiosum. This area also fills with blood during an erection. It is connected to the most sensitive part of the penis, the tip or head, called the glans penis.
  

  The glans penis is a little bonus from nature, an extra source of sexual enjoyment for the man. It normally becomes firmer and larger when a man is aroused. And a man will respond more quickly to stimulation at this pointthan anywhere else along the penis.
  

  The skin of the penis slides easily over the entire penile shaft. All males are born with an extension of this skin, called the foreskin, which covers the glans penis. However, it has been very common for American men to have had the foreskin removed shortly after birth with a minor surgery called circumcision. (There is usually no medical reason for circumcision, and these days many parents choose not to circumcise their baby boys.)
  

  *23\184\8*