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The submandibular glands are a pair of salivary glands located beneath the lower jaw, on either side of the neck. They are one of several pairs of salivary glands in the mouth and produce about 70% of the total saliva in the mouth.
The submandibular glands secrete a thick, viscous fluid that contains enzymes, electrolytes, and mucus. The enzymes in the saliva help to break down carbohydrates and fats in the food, while the mucus helps to lubricate the mouth and throat.
The submandibular glands are innervated by the facial nerve (cranial nerve VII) and the glossopharyngeal nerve (cranial nerve IX), which provide both motor and sensory functions. Stimulation of these nerves can increase the production and flow of saliva from the submandibular glands.
Several conditions can affect the submandibular glands, including infections, inflammation, and tumors. If the submandibular glands become inflamed or infected, it can cause pain and swelling in the mouth and difficulty in eating and swallowing. Treatment for submandibular gland disorders may involve medication, antibiotics, or in some cases, surgical removal of the affected gland.