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.
The Parotid Gland. The parotid gland is a bilateral salivary gland located in the face. It produces serous saliva, a watery solution rich in enzymes. This is then secreted into the oral cavity, where it lubricates and aids in the breakdown of food. In this article, we shall look at the location, vasculature and innervation of the parotid gland.