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.
Humans have three pairs of major salivary glands. These consist of the parotid glands, submandibular glands, and sublingual glands. The parotid glands are located anterior to the ear, over the angle of the jaw and extending into the upper neck.The submandibular glands are smaller and are located under the jaw.umors of the parotid glands, the largest salivary glands, have only a 20% likelihood of malignancy, whereas tumors of the minor salivary glands have an 80% likelihood of being malignant. The most common type of benign salivary gland tumor is a benign mixed tumor, or pleomorphic adenoma.