Blood flowing towards the lungs has more of ....... than the blood flowing away from the lungs.

  • A
    Oxygen
  • B
    $CO_2$
  • C
    Hydrogen
  • D
    None of these

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Similar Questions

Which type of circulatory system is shown in the given figure?

The systemic circulation provides nutrients, $A$ and other essential substances to the $B$ and takes $C$ and other harmful substances away for elimination. Choose the correct option for $A, B$ and $C$.

Amphibians and reptiles receive blood in the left atrium from......

Cockroach and snails show circulation of blood through haemocoel. It is . . . . . . .

Discuss the circulatory system in various vertebrates and the gradual development of the heart.

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