In addition, mucous glands often secrete a small amount of mucus, which is evenly distributed on the mucosal surface and absorbs dust and microorganisms inhaled in the air. Mucus also contains lysozyme, which can inhibit and dissolve bacteria. This mucus is snot.
Extended data:
Composition of nasal mucus
Most nasal mucus is secreted by nasal mucosa. The nasal mucosa contains a goblet cell, which produces a lot of mucin. After mucin is released outside the cell, it absorbs a lot of water and forms nasal mucus.
Some snots are actually tears. These tears are produced by lacrimal glands, some of which flow to lacrimal canaliculus, and then flow to nasal cavity through nasolacrimal duct, becoming a part of nasal mucus.
The inner surface of healthy people's nasal cavity is lined with a complete mucosa, on which there are many cup-shaped cells with secretory function, and there are mucus glands under the mucosa. They are constantly secreted at ordinary times, and the secreted water is used to moisten and inhale air.
In addition, mucous glands often secrete a small amount of mucus, which is evenly distributed on the mucosal surface and absorbs dust and microorganisms inhaled in the air. Mucus also contains lysozyme, which can inhibit and dissolve bacteria. This mucus is snot.