Question 1
Pericardial fluid
◦ prevents backflow of blood from one chamber to the other.
◦ lubricates the electrical system of the heart.
◦ decreases friction of the pericardial layers as they rub against each other.
◦ circulates through the heart's chambers.
Question 2
The innermost layer of the heart is the
◦ pericardium.
◦ epicardium.
◦ myocardium.
◦ endocardium.