Cardiac Cycle

Front

What is the function of the right atrium in the cardiac cycle?

Back

The right atrium receives deoxygenated blood from the body through the superior and inferior vena cavae.

Front

Identify the parts of the heart involved in pulmonary circulation.

Back

The right atrium, right ventricle, pulmonary artery, and left atrium are involved in pulmonary circulation.

Front

What is the role of the left side of the heart?

Back

The left side of the heart pumps oxygen-rich blood to the rest of the body.

Front

What happens during ventricular systole?

Back

During ventricular systole, the atrioventricular valves close and the semilunar valves open, allowing blood to be ejected from the ventricles.

Front

Define diastole in the context of the cardiac cycle.

Back

Diastole is the phase of the cardiac cycle when the heart muscle relaxes and the chambers fill with blood.

Front

What is the significance of the semilunar valves?

Back

The semilunar valves prevent the backflow of blood from the arteries into the ventricles after contraction.

Front

Explain the term 'cardiac output'.

Back

Cardiac output is the volume of blood the heart pumps per minute, calculated as heart rate multiplied by stroke volume.

Front

What is the difference between systole and diastole?

Back

Systole refers to the contraction phase of the heart, while diastole refers to the relaxation phase.

Front

What triggers the heart to contract?

Back

The heart contracts in response to electrical impulses generated by the sinoatrial (SA) node.

Front

What is the role of the atrioventricular (AV) valves?

Back

The AV valves (tricuspid and mitral valves) prevent backflow of blood from the ventricles into the atria during ventricular contraction.