Blood circulation takes the following course in the human heart:
(a) Left atrium to left ventricle to lungs to right atrium to right ventricle.
(b) Right atrium to right ventricle
(c) Left atrium to left ventricle
(d) Right atrium to right ventricle to lungs to left atrium to left ventricle.
Choose the correct answer.
Answers
Answer:
The blood pumped by the right ventricle enters the pulmonary artery, whereas the left ventricle pumps blood into the aorta. The deoxygenated blood pumped into the pulmonary artery is passed onto the lungs from where the oxygenated blood is carried by the pulmonary veins into the left atrium. This pathway constitutes the pulmonary circulation. The oxygenated blood entering the aorta is carried by a network of arteries, arterioles, and capillaries to the tissues from where the deoxygenated blood is collected by a system of venules, veins and vena cava and emptied into the right atrium. This is the systemic circulation. The systemic circulation provides nutrients, O
2
and other essential substances to the tissues and takes CO
2
and other harmful substances away for elimination.
So, the correct answer is option A.
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(a) Left atrium to left ventricle to lungs to right atrium to right ventricle.
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