Why are the walls of the atria thinner than the walls of the ventricles

The blood is pumped down to the ventricles, which are larger pumping chambers which must propel blood out of the heart therefore, they contain more muscle tissues than atria do. On the right side, the right ventricles pumps blood out through the pulmonary arteries to the lungs, which isn't a long distance .

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Hi Sophonie

Because the ventricles need to pump blood to the entire body

surface mining destroys mountain tops, landscapes, forests and wildlife habitats. on top of that, it leads to soil erosion and destruction of agricultural land. the landscape changes can also disrupt river channels and streams, which leads to flooding. which, can destroy plant life and other animals as well.

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