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Blood Vessels

Why is the ao...

Question

Why is the aorta connected to the left ventricle while the pulmonary vein to the left atrium?

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Solution

The left ventricle is one of the four chambers of the heart which is present in the lower part of the heart towards the left side. This chamber finally pumps the oxygenated blood out of the heart so that it can reach all the other parts of the body. Hence, it is connected to the aorta which is also the largest artery in the human body. [2 Marks]

The oxygenated blood from the right and the left side of the lungs reaches the left atrium through the respective pulmonary vein. This is why the pulmonary vein is connected to the left atrium. [1 Mark]

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Q. Match the following chambers of the heart with the respective blood vessels:

	Column A		Column B
$1.$	Right atrium	$a .$	Pulmonary vein
$2.$	Left atrium	$b .$	Aorta
$3.$	Right ventricle	$c .$	Superior vena cava
$4.$	Left ventricle	$d .$	Pulmonary artery

Q. Why the aorta and the pulmonary vein is crossed and connected to the left and right ventricles respectively, Why they can't they be connected in straight to the ventricles?

Q. Read the statements and select the option which best describes the process that occurs during systematic circulation.
(i) The left atrium receives the oxygenated blood through the pulmonary veins. The left ventricle pumps the blood through the aorta to various parts and the de-oxygenated blood reaches right atrium.
(ii) The left atrium receives the oxygenated blood through pulmonary veins and pumps the blood through the aorta to various parts and the de-oxygenated blood reaches the right atrium.
(iii) The left atrium receives de-oxygenated blood and pumps into left ventricles which in turn pumps into pulmonary artery for oxygenation.
(iv) The right atrium receives the de-oxygenated blood and pumps into pulmonary artery for oxygenation.

Q. Which of the following statement(s) wrong with regard to heart?
A. Left atrium receives deoxygenated blood from different parts of the body while right atrium receives deoxygenated blood from the lungs.
B. Right atrium receives deoxygenated blood from different body parts while right ventricle pumps deoxygenated blood to the lungs.
C. Left atrium receives oxygenated blood from lungs while left ventricle pumps oxygenated blood to different parts of the body.
D. Pulmonary vein carries deoxygenated blood to the lungs and pulmonary artery brings oxygenated blood towards the heart.

Q. How many pulmonary veins carry oxygenated blood from lungs to the left atrium ? And how many pulmonary arteries carry the deoxygenated blood from the right ventricle to the lungs?

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