Which best describes the pericardium?
structures inside the heart that ensure that blood flows in one direction only
a sac around the heart that allows the heart muscle to receive oxygen
a sac around the heart that protects the heart and chest tissues
structures inside the heart that bring blood to the lungs for oxygenation
Answers: 2
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Which best describes the pericardium?
structures inside the heart that ensure that blood flows in o...
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