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"Pericardium" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.

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A conical fibro-serous sac surrounding the HEART and the roots of the great vessels (AORTA; VENAE CAVAE; PULMONARY ARTERY). Pericardium consists of two sacs: the outer fibrous pericardium and the inner serous pericardium. The latter consists of an outer parietal layer facing the fibrous pericardium, and an inner visceral layer (epicardium) resting next to the heart, and a pericardial cavity between these two layers.

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This graph shows the total number of publications written about "Pericardium" by people in this website by year, and whether "Pericardium" was a major or minor topic of these publications.
Bar chart showing 38 publications over 25 distinct years, with a maximum of 3 publications in 1998 and 2010 and 2014
To see the data from this visualization as text, click here.