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Figure shows schematic plan of blood cir...

Figure shows schematic plan of blood circulation in humans with labels A to D, Identify the label and give its function`//` s.

A

C-vena Cava-takes blood from body parts to right auricle, `PCO_(2)=45` mm Hg

B

D-Dorsal aorta-takes blood from heart to body parts, `PO_(2)=95 ` mm Hg

C

A-Pulmonary vein-takes impure blood from body parts, `PO_(2)=60` mm Hg

D

B-Pulmonary artery-takes blood from heart to lungs, `PO_(2)=90` mg Hg

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A
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