Question

serous fluid secreted by both the parietal and visceral layers of the pericardium, and released into the pericardial cavity, lubricates the membranes and facilitates the almost frictionless movement of the heart when it beats. true or false

Explanation:

The parietal and visceral layers of the pericardium secrete serous fluid into the pericardial cavity. This fluid lubricates the membranes and enables the heart to beat with minimal friction. This is a well - established physiological fact.

Answer:

True