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Sigma KEE - Pericardium
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Pericardium
The pericardium, also called pericardial sac, is a double-walled sac containing the Heart and the roots of the great vessels. It has two layers, an outer layer made of strong connective Tissue (fibrous pericardium), and an inner layer made of serous membrane (serous pericardium). It encloses the pericardial cavity, which contains pericardial fluid, and defines the middle mediastinum. It separates the heart from interference of other structures, protects it against infection and blunt trauma, and lubricates the heart's movements.[from Wikipedia]
Relationships      
Parents AnimalAnatomicalStructure AnatomicalStructures that are possessed exclusively by Animals.
  Container Any Holder whose purpose is to contain something else. Note that Container is more specific in meaning than Holder, because a Container must have a Hole that is at least partially filled by the thing contained.


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