Answered by SecondMedic Expert
Cardiologist · Cardiology / Heart disease
Verified
The heart's main function is to pump blood around the body. It does this by contracting and relaxing in a regular rhythm. The heart also helps to regulate blood pressure and control the flow of blood through the body.
The heart is made up of cardiac muscle tissue, which is a type of muscle that contracts in a regular rhythm. This means that the heart can beat on its own without any outside stimulation. The pacemaker of the heart is a group of cells in the right atrium (upper chamber) that sets the rhythm for the heartbeat.
