👉 The term "epicardium" refers to the innermost layer of a human heart, which is composed primarily of blood vessels and muscle tissue. It forms the largest part of the heart and plays a crucial role in regulating heart rate and blood pressure. The epicardium is responsible for pumping blood from the left atrium to the right ventricle, where it returns to the body via the pulmonary artery. The epicardium also contains blood vessels that supply oxygenated blood to the heart
