Here are 10 things you may not know about Lean: 1  Codeine, one ingredient in âLeanâ is an opiate similar to: Heroin, Morphine, Oxycontin or Vicodin. 2  Weâve coined Lean as, âHip-Hopâs New Heroinâ. 3  Not a good look by the way, if youâve ever seen a heroin addict.
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.
This large duct carries the saliva away from the gland and into the mouth. The position of each of the three pairs of large salivary glands is indicated by their names. Parotid means near the ears; sublingual means under the tongue; and submandibular means under the mandible (that is, under the jaw-bone).unctions of saliva include the following: The saliva from the parotid gland is a rather thin, watery fluid, but the saliva from the sublingual and the submandibular glands contains mucus and is much thicker. The salivary glands are solid structures composed of millions of secretory cells.