Assertion: epithelium | /r/MadeOf | single layer of cells
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: Epithelial tissue usually consists of a single layer of cells, however in certain cases there may be more than one layer.
text: Epithelial tissue consisting of a single layer of cells is classified as simple epithelium, while multiple cell layers constitute stratified epithelium.
text: If an epithelial tissue consists of a single layer of cells, it is called a simple