Effects of anesthesia on the human body

In this paper we described the effect of anesthesia on the human body, modern methods which used in anesthesiology and their consequences. Definitions (local, general anesthesia) and classification of anesthesia have been given. It is concluded when anesthesia is necessary and estimate its consequences, described its methods, types and influence. We have identified the main complications caused with using anesthesia and identify risks of using anesthetic and opinions of anesthetists in this issue.