The walls of the ventricles are much thicker than those of the atria because

  • A
    They have to pump the blood
  • B
    They have to receive the blood
  • C
    They are present below the atria
  • D
    They have to store the blood

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Similar Questions

The discovery of blood circulation was made by which scientist?

The heartbeat of a human is heard on the left side because:

The blood pumped by the $A$ ventricle enters the $B$ artery,whereas the $C$ ventricle pumps blood into the $D$. Choose the correct option for $A, B, C$ and $D$.

Give the location of the heart.

$P$ - Statement: Birds and mammals have a four-chambered heart.
$Q$ - Reason: In mammals,the aortic arch curves to the left.

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