Heart 2

Front

What happens to the ventricles during atrial systole?

Back

The ventricles are in diastole.

Front

What is the primary function of the atrium?

Back

To collect blood.

Front

What is the definition of the Cardiac Cycle?

Back

The sequence of events that occur during one complete heartbeat.

Front

What causes the 'Dub' sound in the heart's LUB DUB?

Back

The closing of the Semilunar Valves.

Front

What is systole?

Back

The phase of the heartbeat when the heart muscle contracts and pumps blood.

Front

What is diastole?

Back

The phase of the heartbeat when the heart muscle relaxes and fills with blood.

Front

What are the Atrioventricular valves?

Back

Valves located between the atria and ventricles that prevent backflow of blood.

Front

What is the role of the Semilunar valves?

Back

To prevent backflow of blood from the arteries into the ventricles.

Front

What is the significance of the cardiac output?

Back

It is the volume of blood the heart pumps per minute, indicating heart efficiency.

Front

What is the role of the sinoatrial (SA) node?

Back

It acts as the natural pacemaker of the heart, initiating the heartbeat.