The human heart is located in the middle of the chest directly under the left side, most of them are located in the middle of the sternum on the left side, a small part of them are located in the middle of the sternum on the right side. The human heart is basically the same size as my fist, shaped like a peach, with the tip of the heart to the left, located in the middle of the chest directly to the left of the bottom, most of them are located in the middle of the sternum to the left, and a small part of them are located in the middle of the sternum to the right. It is composed mainly of heart muscle and includes four chambers: the left atrium, the left ventricle, the right atrium, and the right ventricle. The main function of the heart is to promote blood flow and provide adequate blood flow to organs and tissues to supply oxygen and various nutrients such as water, inorganic salts, glucose, protein, etc., and to carry away the end products of metabolism, such as carbon dioxide, urea, and uric acid, etc., so as to enable the cells to maintain normal metabolism and function. Therefore, when the heart appears pain, suffocation and other uncomfortable symptoms, it is recommended to choose to seek medical treatment in a timely manner to avoid delays in treatment.