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The membrane surrounding the heart and defining its cavity is the:

APeriosteum
BPeritoneum
CPericardium
DPerimysium
Answer & Solution
Correct answer: C. Pericardium
1. It also wraps the roots of the great vessels. 2. It defines the space the heart sits in. 3. That membrane is the pericardium. _Source: OpenStax Anatomy and Physiology 2e, Chapter 19, The Cardiovascular System: The Heart._
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