I. Main Idea: Anesthetic is a chemical substance which affects nerves.
Supporting Details:
- A. They cause a loss of feelings. All humans experience physical pain of some sort.
- B. A skinned knee, a cut finger or a headache make a person feel pain.
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II. Main Idea: There are many ways to lessen pain.
Supporting Details:
- A. Aspirin, liniments, and rubbing alcohol are commonly used at home.
- B. But there are some conditions in which these mild pain relievers fail In surgery, anesthetics are used to eliminate the pain which accompanies the operation.
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III. Main Idea: Besides lessening pain, anesthetics serve other purposes.
Supporting Details:
- A. They reduce or eliminate reflex activity and relax muscles.
- B. They may be used to induce unconsciousness. Therefore surgical operations can be performed effectively.
