The membrane sac directly surrounding the heart is the:
APeriosteum
BPeritoneum
CPerimysium
DPericardium
Answer & Solution
Correct answer: D. Pericardium
1. The name means around the heart.
2. It defines a fluid filled cavity.
3. That sac is the pericardium.
_Source: OpenStax Anatomy and Physiology 2e, Chapter 19, The Cardiovascular System: The Heart._
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