What type of tissue lines the interior surface of the heart?

The interior surface of the heart is lined by the endocardium, which is a specialized type of tissue. This layer consists of a thin lining of endothelial cells that provide a smooth surface for blood flow and helps to prevent turbulence as blood circulates through the heart chambers. The endocardium also plays a critical role in the proper function of heart valves, ensuring they work effectively as blood moves in and out of the heart. Understanding the structure and function of the endocardium is essential for recognizing how the heart maintains its efficiency and overall health.

In contrast, the myocardium is the thick muscular layer responsible for the heart's contraction and pumping action, and the pericardium is the protective sac surrounding the heart. The pleura is a membrane associated with the lungs, not the heart. This differentiation between these types of tissues is crucial for understanding the overall anatomy and physiology of the cardiovascular system.