Assertion: endocardium's layer | /r/HasProperty | cardiac muscle
Facets:
value: mainly
type: DEGREE
Source sentences:
text: Layers of heart wall epicardium: superficial layer myocardium: middle layer, composed of cardiac muscle, forms bulk of heart endocardium: third layer, deepest, consists of squamous epithelium, lines heart chambers, is located on inner surface of myocardium.
text: The myocardium,4 by far the thickest layer, is composed of cardiac muscle and performs the work of the heart.
text: The middle layer is the myocardium and is composed mainly of cardiac muscle and forms the bulk of the heart.
text: Middle layer--Myocardium ("muscle heart") is composed mainly of cardiac muscle and forms the bulk of the heart.