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(D) In the human circulatory system,the schematic diagram represents double circulation.$A$ represents the Pulmonary vein,which carries oxygenated blo

Vedclass · Accepted Answer

$C -$ Vena cava - takes blood from body parts to right atrium,$PCO_2 = 45 \, mm \, Hg$

Vedclass · Answer

(D) In the human circulatory system,the schematic diagram represents double circulation.$A$ represents the Pulmonary vein,which carries oxygenated blood from the lungs to the left atrium.$B$ represents the Dorsal aorta,which carries oxygenated blood from the left ventricle to various body parts.$C$ represents the Vena cava,which carries deoxygenated blood from various body parts to the right atrium.$D$ represents the Pulmonary artery,which carries deoxygenated blood from the right ventricle to the lungs.Evaluating the options:Option $A$ is incorrect as $D$ is the Pulmonary artery.Option $B$ is incorrect as $A$ is the Pulmonary vein carrying oxygenated blood.Option $C$ is incorrect as $B$ is the Dorsal aorta.Option $D$ is correct: $C$ is the Vena cava,which brings deoxygenated blood from body tissues to the right atrium,and the $PCO_2$ of deoxygenated blood is typically $45 \, mm \, Hg$.

The given figure shows the schematic plan of blood circulation in humans with labels $A$ to $D$. Identify the label and give its function/functions.

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