What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Atrium, Atria and Ventricles

The heart is the no doubt, most important part of our body. Our heart is composed of four chambers; two upper and two lower which are called atria and ventricle respectively. Basically, the heart is a pump and clean the blood or you can say covert de-oxygenated blood into the oxygenated blood to supply clean blood to all parts of the body.