What is the primary function of the pericardial sac?
A)to prevent excessive expansion of the heart as it fills with blood
B)to secrete a fluid that reduces friction as the heart beats
C) to serve as a reservoir for blood to be used during strenuous exercise
D) to provide oxygen and nutrients to the heart muscle

Question

Quizplus · Accepted Answer

The primary function of the pericardial sac is to secrete a fluid that reduces friction as the heart beats. It does not prevent excessive expansion of the heart, serve as a blood reservoir, or provide oxygen and nutrients to the heart muscle.

What Is the Primary Function of the Pericardial Sac