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.
Salivary glands make the saliva in your mouth, which is very important for the health of your mouth and teeth (eg it stops your mouth drying out) - and also for the first stages of digestion of food (it contains some enzymes and salts).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.