Mechanism or Working of Heart: The work of the heart is to receive the blood and then pump it out of the heart with great force. In order to do this function heart keeps on relaxing and contracting throughout the life of a person. The contraction of the heart is known as Systole and relaxation is termed as Diastole. The systole and diastole alternate with each other. The contraction of the heart chambers decreases the volume of the heart chambers and forces the blood out of them. The relaxation of heart chambers bring the heart back to normal size and … Continue reading Mechanism or Working of Heart (Cardiac Cycle)