PATHOLOGY

Detailed explanation-1: -The endocardium is the innermost layer of the heart and lines the chambers and extends over projecting structures such as the valves, chordae tendineae, and papillary muscles.

Detailed explanation-2: -The outer layer of the heart wall is the epicardium, the middle layer is the myocardium, and the inner layer is the endocardium.

Detailed explanation-3: -The wall of the heart separates into the following layers: epicardium, myocardium, and endocardium. These three layers of the heart are embryologically equivalent to the three layers of blood vessels: tunica adventitia, tunica media, and tunica intima, respectively.

Detailed explanation-4: -The endocardium is composed of simple squamous epithelial cells which form the inner lining of the heart chambers. The endocardium connects to blood vessels that supply the heart muscle and contributes to the regulation of heart contractions.