Which sequence correctly describes the flow of blood through the heart?

Which sequence correctly describes the flow of blood through the heart?

• A. Right Atrium, Right Ventricle, Aorta, Lungs, Pulmonary Arteries, Left Atrium, Left Ventricle, Pulmonary Veins
• B. Right Atrium, Right Ventricle, Pulmonary Arteries, Lungs, Pulmonary Veins, Left Atrium, Left Ventricle, Aorta
• C. Right Atrium, Pulmonary Arteries, Right Ventricle, Lungs, Pulmonary Veins, Left Atrium, Aorta, Left Ventricle
• D. Right Atrium, Right Ventricle, Pulmonary Veins, Lungs, Pulmonary Arteries, Left Atrium, Left Ventricle, Aorta

Answer: (B)

Understanding how blood moves through the heart starts with tracing the path of blood from the right side to the left side and then out to the body. Deoxygenated blood returns to the heart into the right atrium, moves into the right ventricle through the tricuspid valve, and is pumped from the right ventricle through the pulmonary valve into the pulmonary arteries toward the lungs. In the lungs, blood picks up oxygen and releases carbon dioxide, then returns to the heart via the pulmonary veins into the left atrium. From there it goes through the mitral valve into the left ventricle and is ejected through the aortic valve into the aorta to nourish the rest of the body. This sequence matches the flow of blood through the heart and lungs: right atrium → right ventricle → pulmonary arteries → lungs → pulmonary veins → left atrium → left ventricle → aorta. The other sequences place vessels in incorrect order (for example, routing blood to the aorta before passing through the lungs, or misplacing the pulmonary arteries/veins relative to the chambers), which would not reflect the actual circulation.

Understanding how blood moves through the heart starts with tracing the path of blood from the right side to the left side and then out to the body. Deoxygenated blood returns to the heart into the right atrium, moves into the right ventricle through the tricuspid valve, and is pumped from the right ventricle through the pulmonary valve into the pulmonary arteries toward the lungs. In the lungs, blood picks up oxygen and releases carbon dioxide, then returns to the heart via the pulmonary veins into the left atrium. From there it goes through the mitral valve into the left ventricle and is ejected through the aortic valve into the aorta to nourish the rest of the body. This sequence matches the flow of blood through the heart and lungs: right atrium → right ventricle → pulmonary arteries → lungs → pulmonary veins → left atrium → left ventricle → aorta. The other sequences place vessels in incorrect order (for example, routing blood to the aorta before passing through the lungs, or misplacing the pulmonary arteries/veins relative to the chambers), which would not reflect the actual circulation.