Understanding the Cardiac Cycle

The video explains the cardiac cycle, starting with the right side of the heart. Deoxygenated blood flows into the right atrium, moves to the right ventricle, and is pumped to the lungs for oxygenation. Oxygenated blood returns to the left atrium, moves to the left ventricle, and is circulated throughout the body. The cycle is completed as the heart prepares for the next intake of blood.

What is the primary function of the right side of the heart?

• To pump oxygenated blood to the body

• To receive deoxygenated blood from the body

• To oxygenate the blood

• To pump blood to the left side of the heart

Through which valve does blood flow from the right atrium to the right ventricle?

• Mitral valve

• Pulmonary valve

• Aortic valve

• Tricuspid valve

What prevents blood from flowing back into the right atrium after it enters the right ventricle?

• Mitral valve

• Tricuspid valve

• Pulmonary valve

• Aortic valve

What happens when the right ventricle contracts?

• The mitral valve opens

• The tricuspid valve opens

• The pulmonary valve opens

• The aortic valve opens

Where does blood pick up oxygen and release carbon dioxide?

• In the lungs

• In the right atrium

• In the aorta

• In the left ventricle

How does oxygenated blood travel from the lungs to the heart?

• Through the aorta

• Through the pulmonary veins

• Through the superior vena cava

• Through the inferior vena cava

Which valve allows blood to flow from the left atrium to the left ventricle?

• Aortic valve

• Mitral valve

• Pulmonary valve

• Tricuspid valve

What is the role of the aortic valve during the cardiac cycle?

• To prevent blood from flowing back into the left ventricle

• To allow blood to flow into the right atrium

• To open when the right ventricle contracts

• To pump blood into the pulmonary artery

What marks the completion of a single cardiac cycle?

• The relaxation of the right atrium

• The opening of the pulmonary valve

• The closure of the tricuspid valve

• The relaxation of the left ventricle