Biology, 05.10.2019 18:20 rorofhs2009

Which best describes the pericardium?

a. structures inside the heart that ensure that blood flows in one direction only
b. a sac around the heart that allows the heart muscle to receive oxygen
c. a sac around the heart that protects the heart and chest tissues
d. structures inside the heart that bring blood to the lungs for oxygenation

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Which best describes the pericardium?

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