Fill in the Blank QuestionFill in the blank question.The three layers of the heart, in the correct order from superficial to deep, are the , the , and the .

The three layers of the heart, in the correct order from superficial to deep, are the epicardium, the myocardium, and the endocardium.

• The epicardium is the outermost layer and is also known as the visceral layer of the serous pericardium.
• The myocardium is the middle layer, composed primarily of cardiac muscle, and is responsible for the heart's pumping action.
• The endocardium is the innermost layer, which lines the interior of the heart chambers and covers the heart valves.

This layered structure helps to protect the heart and supports its function in circulating blood throughout the body.