What is the mechanical activity of the heart?

The mechanical activity of the heart primarily involves the processes of contraction and relaxation that enable blood to be pumped throughout the body. This activity is divided into two main phases: systole, when the heart muscles contract to eject blood from the chambers, and diastole, when the heart relaxes and fills with blood. The coordinated contractions of the atria and ventricles ensure efficient blood flow, regulated by electrical impulses from the heart's conduction system. Overall, this rhythmic action is essential for maintaining circulation and delivering oxygen and nutrients to tissues.