what is a mucus
Mucous cells of the stomach lining secrete mucus (pink) into the lumen. In vertebrates, mucus (/mjuËkÉs/ MYOO-kÉss; adjectival form: mucous) is a slippery secretion produced by, and covering, mucous membranes. Mucous fluid is rich in glycoproteins and water and is typically produced from cells found in mucous glands.