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The heart sits between the lungs in the thoracic space known as the:

AMediastinum
BMetatarsal
CMetacarpal
DMesentery
Answer & Solution
Correct answer: A. Mediastinum
1. The space lies medially, between the two lungs. 2. It holds the heart and the great vessels. 3. That space is the mediastinum. _Source: OpenStax Anatomy and Physiology 2e, Chapter 19, The Cardiovascular System: The Heart._
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