Q175 / 180 · AIIMS 2016 · Zoology

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. Figure

  • Correct answer
    A
    C - Vena Cava - takes blood from body parts to right atrium, $\mathrm{Pco}_2=45 \mathrm{~mm} \mathrm{Hg}$
  • B
    D - Dorsal aorta - takes blood from heart to body parts, $\mathrm{Po}_2=95 \mathrm{~mm} \mathrm{Hg}$
  • C
    A - Pulmonary vein - takes impure blood from body parts to heart, $\mathrm{Po}_2=60 \mathrm{~mm} \mathrm{Hg}$
  • D
    B - Pulmonary artery - takes blood from heart to lungs, $\mathrm{Po}_2=90 \mathrm{~mm} \mathrm{Hg}$.

Solution

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

Hence, the correct answer is option: 'A'.

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