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 gland is roughly wedge-shaped when seen superficially and on horizontal sections. The parotid duct, a long excretory duct, emerges from the anterior border of the gland, superficial to the masseter muscle.The duct pierces the buccinator muscle, then opens into the oral cavity on the inner surface of the cheek, usually opposite the maxillary second molar.he gland is roughly wedge-shaped when seen superficially and on horizontal sections. The parotid duct, a long excretory duct, emerges from the anterior border of the gland, superficial to the masseter muscle.