
	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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helix (he´liks) pl. he´lices, helixes a winding structure; see also coil and spiral.
the superior and posterior free margin of the pinna of the ear.

α-helix , alpha helix the complex structural arrangement of parts of protein molecules in which a single polypeptide chain forms a right-handed helix.

double helix , Watson-Crick helix the usual configuration of double-stranded deoxyribonucleic acid (DNA) in vivo, being two complementary antiparallel polynucleotide chains coiled into a helix, with the sugar-phosphate backbone on the outside and the two chains held together by hydrogen bonds between pairs of bases.

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