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An endoscope consists of two basic parts: A tubular probe fitted with a tiny camera and bright light, which is inserted through a small incision; and a viewing screen, which magnifies the transmitted images of the body's internal structures. During surgery, the surgeon watches the screen while moving the tube of the endoscope through the surgical area.
It's important to understand that the endoscope functions as a viewing device only. To perform the surgery, a separate surgical instrument--such as a scalpel, scissors, or forceps--must be inserted through a different point of entry and manipulated within the tissue.
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