Nat Rev Gastroenterol Hepatol. 2009;6:331-341. The discovery of gastric polyps during an endoscopic examination of the stomach is a relatively common occurrence for gastroenterologists. In fact, a diverse array of polyps and polypoid lesions are found in the stomach.
Most animals have three major pairs of salivary glands that differ in the type of secretion they produce: 1  parotid glands produce a serous, watery secretion. 2  submaxillary (mandibular) glands produce a mixed serous and mucous secretion.3  sublingual glands secrete a saliva that is predominantly mucous in character.cini in the parotid glands are almost exclusively of the serous type, while those in the sublingual glands are predominantly mucus cells. In the submaxillary glands, it is common to observe acini composed of both serous and mucus epithelial cells.
1 The parotid gland makes 25% of the saliva and drains into the mouth near the upper teeth. 2  The submandibular gland makes 70% of the salvia and drains into the mouth from under the tongue. 3  The sublingual gland makes 5% of the saliva and drains into the floor of the mouth.