Q.

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

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a

C - Vena Cava - takes blood from body parts to right auricle, Pco2 = 45 mm Hg

b

D - Dorsal aorta - takes blood from heart to body parts,Po2 = 95 mm Hg

c

A - Pulmonary vein - takes impure blood from body parts, Po2 = 60 mm Hg

d

B - Pulmonary artery - takes blood from heart to lungs, Po2 = 90 mm H g.

answer is A.

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