Which sequence correctly describes the flow of blood from the vena cavae through the heart to the aorta?

Which sequence correctly describes the flow of blood from the vena cavae through the heart to the aorta?

• A. IVC/SVC, Right Atrium, Tricuspid Valve, Right Ventricle, Pulmonary Artery, Pulmonary Valve, Lungs, Pulmonary Vein, Left Atrium, Mitral Valve, Left Ventricle, Aortic Valve, Aorta.
• B. IVC/SVC, Right Atrium, Tricuspid Valve, Right Ventricle, Pulmonary Valve, Pulmonary Artery, Lungs, Pulmonary Vein, Left Atrium, Mitral Valve, Left Ventricle, Aortic Valve, Aorta.
• C. IVC/SVC, Right Atrium, Tricuspid Valve, Right Ventricle, Pulmonary Valve, Pulmonary Artery, Lungs, Pulmonary Vein, Left Atrium, Mitral Valve, Left Ventricle, Aorta, Aortic Valve.
• D. IVC/SVC, Right Atrium, Tricuspid Valve, Right Ventricle, Tricuspid Valve, Right Ventricle, Pulmonary Valve, Aorta, Lungs, Pulmonary Vein, Left Atrium, Mitral Valve, Left Ventricle, Aorta.

Answer: (B)

Blood moves through the heart in a single, valve-guided path that ensures deoxygenated blood returns to the lungs and oxygenated blood is pumped to the body. Start with blood returning from the body via the vena cavae into the right atrium, then it passes through the tricuspid valve into the right ventricle, and from there through the pulmonary valve into the pulmonary artery to reach the lungs for gas exchange. After picking up oxygen, blood returns via the pulmonary veins into the left atrium, moves through the mitral valve into the left ventricle, and is pumped through the aortic valve into the aorta to supply the body. This sequence—vena cavae, right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary artery, lungs, pulmonary veins, left atrium, mitral valve, left ventricle, aortic valve, aorta—follows the correct order of vessels and valves. The other options misplace a valve relative to the corresponding vessel or reorder the pathway, which would disrupt the one-way flow.

Blood moves through the heart in a single, valve-guided path that ensures deoxygenated blood returns to the lungs and oxygenated blood is pumped to the body. Start with blood returning from the body via the vena cavae into the right atrium, then it passes through the tricuspid valve into the right ventricle, and from there through the pulmonary valve into the pulmonary artery to reach the lungs for gas exchange. After picking up oxygen, blood returns via the pulmonary veins into the left atrium, moves through the mitral valve into the left ventricle, and is pumped through the aortic valve into the aorta to supply the body. This sequence—vena cavae, right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary artery, lungs, pulmonary veins, left atrium, mitral valve, left ventricle, aortic valve, aorta—follows the correct order of vessels and valves. The other options misplace a valve relative to the corresponding vessel or reorder the pathway, which would disrupt the one-way flow.