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 is usually because of a sudden blockage (obstruction) of the salivary ducts. This can be caused by either a 'stone' or thicker saliva in the ducts of the major salivary glands or because of injury to the minor salivary glands and ducts (eg you might have bitten your cheek or lips accidentally).ne of the most common problems of the parotid glands is mumps, which is an acute virus infection that gives pain and swelling usually on both sides. The ducts of parotid glands can also get blocked, leading to swelling, infection and pain.