Figure shows schematic plan of blood cir- culation in humans with labels A to Z. Identify the label and give its functions

Options

A. B - Pulmonary artery-takes blood from heart to lungs, `PO_(2) = 90 mm` Hg
B. C - Vena Cava-takes blood from body parts to right auricle, `PCO_(2) = 45 mm` Hg
C. D - Dorsal aorta-takes blood from heart to body parts, `PO_(2) = 60 mm` Hg
D. A - Pulmonary vein-takes impure blood from body parts, `PO_(2) = 60 mm` Hg

Answer

B