
	3D Medical Animations Close This information is provided by an independent source. Merck & Co. does not endorse and is not responsible for the accuracy of the content, or for the practices or standards of non-Merck sources. This information provided is not intended to be a substitute for professional medical advice. A licensed healthcare professional should be consulted for diagnosis and treatment of any and all medical conditions. The manufacturer of a product generally has the most complete information about that product. How to use How to use The world's largest library of 3D medical animations developed and copyrighted by Blausen Medical Communications. The Human Atlas figures rotating model, labeled slides, and printable text in addition to animated videos. Shows a video of the selected health topic. Controls play, pause, and restart of the video. Shows a summary of the selected health topic. Controls to scroll the text. Shows a 3 D model of the video. Controls to rotate the model. Shows slides from the video. Controls to change slides.

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This information is provided by an independent source. Merck & Co., Inc. is not responsible for this content. Please discuss any and all treatment options with your healthcare professional. The manufacturer of a product generally has the most complete information about that product.

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laryngitis (lar″in-ji´tis) inflammation of the mucous membrane of the larynx, characterized by dryness and soreness of the throat, hoarseness, cough, and difficulty swallowing. Acute laryngitis may be caused by overuse of the voice, allergies, irritating dust or smoke, hot or corrosive liquids, or even violent weeping. After repeated attacks of the acute type, chronic laryngitis may develop, caused mostly by continual irritation from overuse of the voice, tobacco smoke, dust, or chemical vapors, or by a chronic nasal or sinus disorder. Often the moist mucous membrane lining the larynx becomes granulated. The granulation can proceed to thickening and hardening of the mucous membrane, which changes the voice or makes it hoarse.

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