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Where does human saliva come from?

The process of salivation is controlled by the autonomic nervous system, so the process of salivation is involuntary, like the heartbeat.

The glands in the mouth that secrete saliva are the salivary glands, which can be divided into major salivary glands and minor salivary glands, of which there are 3 pairs of major salivary glands, which are the sublingual glands, the parotid glands, and the submandibular glands. There are many minor salivary glands, distributed on the oral mucosa.

The salivary glands work continuously, in addition to keeping the oral environment moist, saliva also has the function of disinfecting, cleaning the mouth, and helping digestion.

In general, healthy adults secrete about 1-1.5 liters of saliva per day, an average of about 30 ml per hour.

Saliva secretion increases when we eat or when the nerves in the brain are stimulated.