What is the function of the heart’s right atrium?
The right atrium receives deoxygenated blood from the body and pumps it into the right ventricle, which then sends it to the lungs.
Which structure in the heart prevents backflow of blood into the right atrium?
The tricuspid valve prevents the backflow of blood into the right atrium when the right ventricle contracts.
What is the role of the left ventricle in the heart?
The left ventricle pumps oxygenated blood to the rest of the body through the aorta.
Which vessel carries oxygenated blood from the heart to the body?
The aorta is the largest artery in the body and carries oxygenated blood from the left ventricle to the rest of the body.
What is the function of the sinoatrial (SA) node in the heart?
The SA node generates electrical impulses that initiate the heartbeat, controlling the heart’s rhythm.
Which part of the heart is responsible for pumping blood to the lungs?
The right ventricle pumps deoxygenated blood to the lungs through the pulmonary artery for oxygenation.
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What is the role of the pulmonary veins?
The pulmonary veins carry oxygenated blood from the lungs back to the left atrium of the heart.
What is the function of the coronary arteries?
The coronary arteries supply oxygen-rich blood to the heart muscle, enabling it to function effectively.
What does the cardiac cycle refer to?
The cardiac cycle refers to the sequence of events that occur in the heart with each heartbeat, including contraction and relaxation of the heart chambers.