Salivary gland

Channel:

WikiReader

Subscribers:

9,560

Published on February 13, 2023 1:44:43 AM ● Video Link: https://www.youtube.com/watch?v=T0LzGDfzJS4

Duration: 13:17

13 views

0

The salivary glands in mammals are exocrine 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 serous, mucous, or seromucous (mixed).
In serous 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 mucin, which acts as a lubricant.
In humans, 1200 to 1500 ml of saliva are produced every day. The secretion of saliva (salivation) is mediated by parasympathetic stimulation; acetylcholine is the active neurotransmitter and binds to muscarinic receptors in the glands, leading to increased salivation.
A proposed fourth pair of salivary glands, the tubarial glands, were first identified in 2020. They are named for their location, being positioned in front of and over the torus tubarius. However, this finding from one study is yet to be confirmed.

Source: https://en.wikipedia.org/wiki/Salivary_gland
Created with WikipediaReaderSentry (c) WikipediaReader
Images and videos sourced from Pexels (https://www.pexels.com)