
	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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substantia (sәb-stan´she-ә) Latin word meaning substance. In anatomy it is used in naming various components of body tissues or structures.

substantia alba white matter.

substantia gelatinosa the substance sheathing the posterior horn of the spinal cord and lining its central canal.

substantia grisea gray matter.

substantia nigra a dark layer of gray matter separating the tegmentum of the midbrain from the crus cerebri.

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