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 development of the parotid gland is unique in two ways compared with that of the other major salivary glands. First, it is the only salivary gland to become encapsulated after the development of the lymphatic system, resulting in the presence of both intraparotid lymph nodes and lymphatic channels.he parotid gland is located at the angle of the mandible, defining an anatomic area termed the parotid space, which contains the facial nerve, the retromandibular vein, the external carotid artery and its branches, and intraparotid lymph nodes (3).