 Salivary gland, the salivary glands in mammals are axocorin glands that produce saliva through a system of ducts. Humans have three paired major salivary glands parotid, submandibular, and sublingual as well as hundreds of minor salivary glands. Salivary glands can be classified as cirrus, mucous or serum mucous mixed. In cirrus secretions, the main type of protein secreted is alpha amylase, an enzyme that breaks down starch into maltose and glucose, whereas in mucous secretions the main protein secreted is musin, which acts as a lubricant. In humans, between 0.5 and 1.5 liter of saliva are produced every day. The secretion of saliva salivation is mediated by parasympathetic stimulation. Acetylcholine is the active neural transmitter and binds too much thorinic receptors in the glands, leading to increased salivation.