Assertion: human eustachian tube | /r/HasProperty | closed
Facets:
value: under normal circumstances
type: TEMPORAL
Source sentences:
text: Under normal circumstances, the human Eustachian tube is closed, but it can open to let a small amount of air through to prevent damage by equalizing pressure between the middle ear and the atmosphere.
text: Under normal circumstances, the human Eustachian tube is closed, but it can open to let a small amount of air through to prevent damage by equalizing pressure between the middle ear and the atmosphere.