Yes
The heart is made of muscle, connective, epithelium, and nervous tissue.
The muscle layer of the heart is the myocardium (or cardiac muscle).
The heart is a main organ . to protect it self from the external effects through cardiac layers which are number in 2 the space between them filled with pericardiacfluid .
The myocardium is not the innermost layer of the heart, the endocardium is.
The thick muscle layer of the heart is the myocardium. It is the middle layer of the heart and produces pressure.
The Endocardium, the inner layer of the heart.
Myocardium
Epicardium is the outer layer of heart tissue. When considered as part of the pericardium, it is the inner layer, continuous with the serial layer.
The main tissue of the heart wall is cardiac muscle tissue, also known as myocardium. This specialized muscle is responsible for the contraction and pumping action of the heart. The heart wall also includes an outer layer called the epicardium and an inner lining called the endocardium, which help protect and support the heart's function.
The endocardium is the innermost layer of the heart wall.
The myocardium (middle layer)
The skin on the heart is called the pericardium. It is a double-walled sac that surrounds and protects the heart, consisting of an outer fibrous layer and an inner serous layer. The serous layer is further divided into the parietal and visceral pericardium, with the visceral layer also known as the epicardium, which is the outer layer of the heart itself. This structure helps reduce friction as the heart beats.