User Forum

Subject :NSO    Class : Class 6

The given diagram shows blood circulation pathway in the heart. Which of the following correctly shows the relative amount of oxygen and carbon dioxide at P, Q, R and S?

AMore CO2 - R; More O2 - P, Q, S
BMore CO2 - Q and R; More O2 - P and S
CMore CO2 - S; More O2 - R
DMore CO2 - P and Q; More O2 - R and S

Explanation for this question

Ans 1:

Class : Class 7
Option D is correct. This is because P and Q shows the deoxygenated blood brought by superior and inferior vena cava respectively.Being deoxygenated it will have more CO2. While R and S shows the oxygenated blood brought by pulmonary vein and carried away by aorta..So it has more oxygen.

Post Your Answer