Which of the following statements is correct | vedclass

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(D) The correct statement is that arteries always carry blood away from the heart. $1$. Option $A$ is incorrect because the pulmonary artery carries d

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Arteries always carry blood away from the heart.

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(D) The correct statement is that arteries always carry blood away from the heart. $1$. Option $A$ is incorrect because the pulmonary artery carries deoxygenated blood and the pulmonary vein carries oxygenated blood. $2$. Option $B$ is incorrect because blood from the veins (vena cava) returns to the right atrium,not the left. $3$. Option $C$ is incorrect because veins contain valves to prevent backflow,while arteries generally do not (except at the base of the aorta and pulmonary artery). $4$. Option $D$ is correct as arteries are defined as vessels that transport blood away from the heart to various body tissues.

Column-$I$	Column-$II$
$P$. Single circulation	$I$. Fishes
$Q$. Incomplete double circulation	$II$. Amphibians and Reptiles
$R$. Complete double circulation	$III$. Crocodiles,Birds,and Mammals

Which of the following statements is correct regarding human circulation?

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Match the following columns:
Column-$I$ Column-$II$
$P$. Single circulation $I$. Fishes
$Q$. Incomplete double circulation $II$. Amphibians and Reptiles
$R$. Complete double circulation $III$. Crocodiles,Birds,and Mammals

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