Assertion: mucous membrane | /r/HasProperty | primary barrier
Facets:
value: between the external world
type: LOCATION
value: between the interior of the body
type: LOCATION
Source sentences:
text: Mucous membranes line the digestive, respiratory, and reproductive tracts and are the primary barrier between the external world and the interior of the body; in an adult human the total surface area of the mucosa is about 400 square meters while the surface area of the skin is about 2 square