MICROANATOMY

Detailed explanation-1: -The left and right sides of the heart work in unison. The atria and ventricles contract and relax in turn, producing a rhythmic heartbeat. The right side of the heart receives deoxygenated blood and sends it to the lungs. The left side of the heart receives blood from the lungs and pumps it to the rest of the body.

Detailed explanation-2: -The atria relaxes while they are filled with blood. Then they contract simultaneously and pump the blood into the ventricles on their respective sides. Then both the ventricles contract together and pump the blood to the different parts of the body.

Detailed explanation-3: -A typical heart has two upper and two lower chambers. The upper chambers, the right and left atria, receive incoming blood. The lower chambers, the more muscular right and left ventricles, pump blood out of the heart.

Detailed explanation-4: -The stages of heart contraction and relaxation can be divided up into 4 parts: ventricular diastole, atrial systole, atrial diastole and ventricular systole.