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 produce saliva, which moistens the mouth to help a person chew and swallow food. Saliva also contains substances (enzymes) that begin the breakdown of food. There are four pairs of salivary glands: 1  The parotid glands are located between the ear and the jaw.2  The submandibular glands are located under the jaw. 3  The sublingual glands are located on the floor of the mouth under the tongue.4  The buccal glands are not shown in this picture.aliva also contains substances (enzymes) that begin the breakdown of food. There are four pairs of salivary glands: 1  The parotid glands are located between the ear and the jaw. 2  The submandibular glands are located under the jaw.