Assertion: artery's lining | /r/HasProperty | inner
Facets:
Source sentences:
text: Arteries consist of an inner lining, one cell thick, called endothelium, a middle layer of smooth muscle and elastic tissue, and an outer layer that is mostly loose connective tissue , which holds the multilayered tube together.
text: Their inner lining is smooth so that blood flows freely, supplying vital organs and tissues with nutrients and oxygen.