Question

Which shows the correct pathway of oxygenated blood entering and leaving the heart?*



(a) Pulmonary vein > left atrium > left ventricle > aorta

(b) Pulmonary vein > left atrium > right ventricle > aorta

(c) Vena cava > right atrium > right ventricle > pulmonary artery

(d) Vena cava > right atrium > left ventricle > pulmonary artery

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Answer 1

Answer:

The heart consists of four chambers in which blood flows. Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium. From the left atrium blood flows into the left ventricle. The left ventricle pumps the blood to the aorta which will distribute the oxygenated blood to all parts of the body.