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Body Fluids and Circulations
Question
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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.

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

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

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

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

Answer

A.

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

In the given figure:

1. A is pulmonary vein which brings pure blood from lungs to left atrium.

2. B is dorsal aorta which carries blood from heart to body parts.

3. C is vena cava which carries impure blood from body parts to right atrium.

4. D is pulmonary artery which takes impure blood from heart to lungs.

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