Assertion: salivary gland's secretion | /r/MadeOf | mucin
Facets:
Source sentences:
text: The main difference between serous and mucous is that serous gland secretes a thin, watery secretion containing zymogens, antibodies, and inorganic ions, which are mainly involved in digestion and defense whereas mucous gland secretes a thick, viscous secretion, containing mucin, which is mainly involved in lubrication.