Question

Why are the wall of ventricle are thicker than the wall of Atria

Answer 1

Answer:

This is because the ventricles have to pump blood from heart throughout the body, that's why more pressure is required. So, to support that pressure, ventricles walls are thick.

On the other hand, in the atrium, the deoxygenated blood from the whole body is collected. This is why blood is flown with much less pressure, hence atria walls are thinner.

Answer 2

here is the answer to your question:

the wall of ventricle are thicker than the wall of Atria becaouse these ventricles have to pump blood out of the heart with great pressure. If the ventricle wall is thin then while pumping out blood, the ventricle may rupture. To save the ventricle from rupturing or any other issue, it has thicker wall than atria.

hope this will help