The wall that separates the two lower chambers of the heart is called

The two lower chambers are called the ventricles, and are separated into the right and left ventricle by the ventricular septum.

Correct answer would be the ventricular septum.

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on