What is the term for the outer layer of the heart?

The term for the outer layer of the heart is the epicardium. The epicardium is a thin layer that serves as the outermost membrane of the heart, providing a protective covering. It also contains blood vessels that supply blood to the heart muscle itself. Understanding the structure of the heart is crucial for recognizing how each layer contributes to overall heart function.

In contrast, the endocardium is the inner lining of the heart, which is in direct contact with blood flow. The myocardium, on the other hand, is the muscular middle layer responsible for the contractile function of the heart, allowing it to pump blood effectively. The pericardium is a fibrous sac surrounding the heart, providing additional protection and support but is not part of the heart's actual structure.