Assertion: circulatory system's artery | /r/MadeOf | three coats
Facets:
Source sentences:
text: An artery is made of three coats, an outermost adventitia or tunica externa of connective tissue having longitudinal elastic and collagen fibres; a thick middle tunica media made of circular smooth muscles and elastic fibres; and an innermost intima or tunica interna made of endothelial cells and an elastic membrane.