3D Medical Animations
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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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Resource Library

Dorland's Medical Dictionary for Healthcare Consumers allows you to look up definitions for medical terms. Terms are listed as they would appear in a printed dictionary. Click the first letter of the term you are looking for. Previous and Next links are available for you to proceed to the next group of terms in that sequence. Scroll down the listing within that range to find the definition you are seeking. Click on the term to display its definition.

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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 health care professional. The manufacturer of a product generally has the most complete information about that product.

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immunoglobulin(Ig)  (im″u-no-glob´u-lin)   a protein of animal origin with known antibody activity; immunoglobulins are major participants in humoral immunity are synthesized by lymphocytes and plasma cells, and are found in the serum and other body fluids and tissues, including the urine, spinal fluid, lymph nodes, and spleen. (See also immunity.) Each immunoglobulin molecule consists of four polypeptide chains: two heavy chains (H chains) and two light chains (L chains). Differences in the H chains are the basis for the classification of immunoglobulins; the five major classes are IgA, IgD, IgE, IgG, and IgM.

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Schematic representation, using an IgG molecule, of the basic structure of immunoglobulins.
 

secretory immunoglobulin A  IgA immunoglobulin in which two IgA molecules are linked by a polypeptide (secretory piece) and by a J chain; it is the predominant immunoglobulin.





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