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Hagrid
The right and left ventricles are responsible for pumping blood while the right and left atria are responsible for receiving blood. These are the four main chambers of the heart that are responsible for transporting oxygenated blood within the body.
jasoncoolness37

Ima simplify it for you guys

1 - Ventricles

2 - Atria

In that order should be correct, have a nice day!

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