Assertion: respiratory tract's function | /r/HasProperty | the secretion
Facets:
value: through microvilli
type: MANNER
Source sentences:
text: The submucous layer is composed of a loose meshwork of connective tissue, containing large blood vessels, nerves, and mucous glands, the main function of which is the secretion, through microvilli, of mucous that is moved upwards by the ciliated cells, allowing and facilitating airway clearance.