Assertion: sebaceous gland's secretion | /r/CapableOf | keep the skin
Facets:
value: by forming a surface emulsion
type: MANNER
Source sentences:
text: The oily secretion (sebum) produced by the sebaceous glands tends to keep the skin soft and pliable by forming a surface emulsion that spreads over the surface of the skin to retain moisture and help maintain proper hydration.36,37,68,152