Assertion: skin's cell | /r/HasProperty | epithelium
Facets:
Source sentences:
text: The body consists of four main types of tissues – lining cells (epithelia), connective tissue, nerve tissue and muscle tissue.
text: Cells that lie on surfaces exposed to the outside world or gastrointestinal tract (epithelia) or internal cavities (endothelium) come in numerous shapes and forms – from single layers of flat cells, to cells with small beating hair-like cilia in the lungs, to column-like cells that line the stomach.