
	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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acid-base balance a state of equilibrium between acidity and alkalinity of the body fluids. Most of the body's metabolic processes produce acids as their end products, but a somewhat alkaline body fluid is required as a medium for vital cellular activities. Therefore chemical exchanges of hydrogen ions must take place continuously in order to maintain a state of equilibrium. An optimal pH (hydrogen ion concentration) between 7.35 and 7.45 must be maintained, or the enzyme systems and other biochemical and metabolic activities will not function normally. If the pH drops below 7.30, the potentially serious condition of acidosis exists. If the pH goes higher than 7.50, the patient is in a state of alkalosis.

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