EVERYDAY SCIENCE

Detailed explanation-1: -Oxygen-rich blood flows from the lungs back into the left atrium (LA), or the left upper chamber of the heart, through four pulmonary veins. Oxygen-rich blood then flows through the mitral valve (MV) into the left ventricle (LV), or the left lower chamber.

Detailed explanation-2: -The 2 upper chambers (atria) receive blood from the lungs (left atrium) and body (right atrium). When these chambers contract, blood is pumped to the 2 lower chambers (left and right ventricles).

Detailed explanation-3: -The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium. From the left atrium blood flows into the left ventricle. The left ventricle pumps the blood to the aorta which will distribute the oxygenated blood to all parts of the body.

Detailed explanation-4: -The coronary veins return oxygen-low blood from the heart’s muscles back to the right atrium so it can be pumped to the lungs.

Detailed explanation-5: -The left side of your heart receives oxygen-rich blood from your lungs and pumps it through your arteries to the rest of your body.