Human beings exhibit 'double circulation' during which blood is passed through the lungs and heart. (a) State the route of the first and the second circulation through the chambers of the heart and explain the usefulness of such circulation in humans. (b) Name the blood vessels that: (i) carry oxygenated blood from the lungs to the heart (ii) carry deoxygenated blood from the heart to the lungs

Question

CASE_STUDIESDouble Circulation in Human BeingsBlood Vessels: Arteries, Veins and Capillaries2 sub-questions

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Assertion (A) : In the human heart ventricles have thicker muscular walls than atria. Reason (R) : Ventricles have to pump the blood into various organs.

Assertion-ReasonStructure and Function of Human HeartDouble Circulation in Human Beings

Which of the following statement (s) is (are) true about human heart ? (a) Right atrium receives oxygenated blood from lungs through pulmonary artery. (b) Left atrium transfers oxygenated blood to left ventricle which sends it to various parts of the body. (c) Right atrium receives deoxygenated blood from different parts of the body through vena cava. (d) Left atrium transfers oxygenated blood to aorta which sends it to different parts of the body.

MCQ (Single)