
	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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histamine (his´tә-mēn) an amine, C₅H₉N₃ found in all body tissues, produced by decarboxylation of histidine. It induces numerous physiological changes in the body: capillary dilation, which increases capillary permeability and lowers blood pressure; contraction of most smooth muscle tissue; increased secretion of gastric acid; and acceleration of the heart rate. It is also a mediator of immediate hypersensitivity. adj., histamin´ic., adj.

histamine phosphate the phosphate salt of histamine, having the same actions as the base; administered by inhalation to test airway hyperresponsiveness in diagnosis of asthma,, subcutaneously as a positive control in skin testing for allergy, and as a diagnostic aid to assess production of hydrochloric acid in the stomach.

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