Which sequence correctly represents the path of blood through the heart?

Which sequence correctly represents the path of blood through the heart?

• A. Right Atrium → Right Ventricle → Lungs → Left Atrium → Left Ventricle → Aorta
• B. Right Ventricle → Right Atrium → Lungs → Left Atrium → Aorta
• C. Right Atrium → Left Ventricle → Lungs → Right Ventricle → Aorta
• D. Right Atrium → Right Ventricle → Aorta → Lungs → Left Atrium

Answer: (A)

The path of blood through the heart follows a single, unidirectional route: deoxygenated blood returns to the heart, enters the right atrium, moves to the right ventricle, is pumped to the lungs to become oxygenated, returns to the heart into the left atrium, passes into the left ventricle, and is then pumped out to the body via the aorta. This exact sequence—right atrium, right ventricle, lungs, left atrium, left ventricle, aorta—reflects the flow from the systemic circulation to the lungs for oxygenation and back to the systemic circulation. The other paths try to skip the lungs, reverse the order of the chambers, or bypass a critical stage, which would disrupt the normal circulation and gas exchange.

The path of blood through the heart follows a single, unidirectional route: deoxygenated blood returns to the heart, enters the right atrium, moves to the right ventricle, is pumped to the lungs to become oxygenated, returns to the heart into the left atrium, passes into the left ventricle, and is then pumped out to the body via the aorta. This exact sequence—right atrium, right ventricle, lungs, left atrium, left ventricle, aorta—reflects the flow from the systemic circulation to the lungs for oxygenation and back to the systemic circulation. The other paths try to skip the lungs, reverse the order of the chambers, or bypass a critical stage, which would disrupt the normal circulation and gas exchange.