The heart is a powerful muscular organ located at the center of the circulatory system in the human body. It is situated in the chest cavity between the two lungs and works continuously throughout life without stopping. Its structure is made of a special muscle tissue called the myocardium. This muscle tissue functions involuntarily and performs constant rhythmic contractions to pump blood throughout the body. The heart consists of four chambers: the right atrium, right ventricle, left atrium, a