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This information is provided by an independent source. Merck & Co., Inc. is not responsible for this content. Please discuss any and all treatment options with your healthcare professional. The manufacturer of a product generally has the most complete information about that product.

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parotid gland either of a pair of glands, the largest of the salivary glands, located on either side of the face just below and in front of the ears. From each gland a duct, the parotid duct, runs forward across the cheek and opens on the inside surface of the cheek opposite the second molar of the upper jaw.The parotid glands are made up of groups of cells clustered around a globular cavity, resembling a bunch of grapes. Small ducts draining each cavity join their neighbors to form large ducts, which in turn join the parotid duct. From the system of ducts flows the thin, watery secretion of the parotid glands called saliva, which plays an important role in the process of digestion. As food is chewed, the saliva with which it is mixed and moistened makes it able to be reduced to a substance that can be swallowed.

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