Viewing the Digestive Tract with an Endoscope
A flexible tube called an endoscope is used to view different parts of the digestive tract. When passed through the mouth (as shown on the left), an endoscope can be used to examine the esophagus, stomach, and some of the small intestine. When passed through the anus (right), an endoscope can be used to examine the rectum and the entire large intestine.
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