The correct answer is c) epicardium, myocardium, endocardium.
Let me explain: The heart is structured with several layers, each serving a distinct purpose. The most superficial layer is the epicardium, which is essentially the heart’s outer layer. This layer provides a protective covering and is involved in the production of fluid that lubricates the heart, allowing it to move smoothly within the pericardial sac.
Next, we have the myocardium, which is the thick, muscular middle layer of the heart. The myocardium is responsible for the heart’s contraction and pumping action, making it the most significant layer for heart function.
Finally, the innermost layer is the endocardium. This thin layer lines the chambers of the heart and covers the heart valves. The endocardium is essential as it smooths the flow of blood within the heart and protects the heart’s chambers from any potential damage.
To summarize, the order of the layers from the outermost to the innermost is epicardium, myocardium, and endocardium.