Assertion: aortic arch | /r/HasProperty | three layers
Facets:
value: at the cellular level
type: OTHER
Source sentences:
text: At the cellular level, the aorta and the aortic arch are composed of three layers: The tunica intima, which surrounds the lumen and is composed of simple squamal epithelial cells; the tunica media, composed of smooth cell muscles and elastic fibers; and, the tunica adventitia, composed of loose collagen fibers.