The Innermost Layer of the Heart Wall is Composed Of

Question

The innermost layer of the heart wall is composed of
A) cardiac muscle
B) simple squamous epithelium
C) connective tissue
D) stratified squamous epithelium
E) vascular tissue

Accepted Answer

The innermost layer of the heart wall is the endocardium, which is composed of simple squamous epithelium. This layer lines the interior of the heart chambers and valves, providing a smooth surface for blood flow.