Assertion: epithelium's surface | /r/CapableOf | come in contact
Facets:
value: with foreign substances
type: OTHER
Source sentences:
text: This tissue covers all organismal surfaces that come in contact with the external environment such as the skin, the airways, and the digestive tract.
text: Epithelium, in anatomy, layer of cells closely bound to one another to form continuous sheets covering surfaces that may come into contact with foreign substances.