Which one has the thickest wall?

The cardiac cycle in a normal adult is about

The difference between systolic and diastolic pressure in human is

Cardiac muscles are

The name of the pacemaker of heart is

Which of the following is the correct pathway for propagation of cardiac impulse?

The blood vessel which supply oxygenated blood to the cardiac tissue is

All or none law is not applicable for

In a normal human, the average cardiac output (stroke volume) is