Question

Differentiate between. Atrial systole and ventricular systole.

Answer 1

The atria begin to contract which is known as atrial systole, following depolarization of the atria and pump blood into the ventricles. Within the ventricles begin to contract which is known as ventricular systole, raising pressure.

Complete answer:

Atrial systole	Ventricular systole
Systole, a period of contraction that occurs between the first and second heart sounds of the cardiac cycle of the ventricles of the heart.	Toward the end of ventricular diastole atrial systole occurs, completing the filling of the ventricles.
First, into the ventricles atrial contraction feeds blood, then blood has been pumped out by the ventricular contraction of the heart to the body systems, including the lungs for resupply of oxygen. In response to an electrochemical stimulus to the heart's cells (cardiomyocytes), cardiac systole is the contraction of the cardiac muscle.	The phase of the cardiac cycle has been referred to by atrial systole. The left and right atria contract pump blood at the same time during atrial systole into the left and right ventricle, respectively.
The contraction of atria is known as atrial systole during the cardiac cycle, while the contraction of ventricles is known as ventricular systole.	Toward the end of ventricular diastole Atrial systole occurs, completing the filling of the ventricles.

Note: During the cardiac cycle, contraction of atria is known as atrial systole; while the contraction of ventricles is known as ventricular systole. In the atria to contract when the action potential triggers the muscles, pumping blood into the ventricles, the pressure within the atria rises further.