What is used to enlarge the opening of any body canal or cavity to facilitate the inspection of its interior?

Answer

A speculum is used to enlarge the opening of a body cavity to facilitate the inspection of the interior. It may be referred to as a diopter as well, although this is an archaic term. Primarily used for vaginal or anal examination.
Q&A Related to "What is used to enlarge the opening of any body..."
speculum. yes, speculum. speculum. A speculum is the instrument in question.
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