Endoscopy is the term used to describe direct examination within the body: whereas, endoscope is the term used to describe the instrument used to perform the examination. The word parts endo, scope, and scopy are used to build the terms.
The terms can be altered forming new terms which identify the body part being examined.
For example, bronchoscopy means visual examination of the bronchus; whereas, bronchoscope is the instrument used for the examination.
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Historical Note: Endoscopy dates back to the time of Hippocrates (460-375 BC) who mentions using a speculum to look into the rectum. By the end of the nineteenth-century cystoscopy, proctoscopy, and esophagoscopy were well established.
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