Question

The given figure shows schematic plan of blood circulation in humans with labels A to D. Identify the labels along with their functions and select the correct option.

• A. C - Vena Cava - takes blood from body parts to right atrium, 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 to heart, Po₂ = 60 mm Hg
• D. B - Pulmonary artery - takes blood from heart to lungs, Po₂ = 90 mm Hg.

Answer 1

Answer: (A)

In the given figure: A is pulmonary vein which brings pure blood from lungs to left atrium, B is dorsal aorta which carries blood from heart to body parts, C is vena cava which carries impure blood from body parts to right atrium, and D is pulmonary artery which takes impure blood from heart to lungs.