QS Study

Salivary glands create quart of saliva each day. Saliva is vital to lubricate your mouth, help with swallowing, guard your teeth against bacteria, and help in the absorption of food. They are located in and around the mouth and throat.

Large salivary glands are –

Large Salivary Glands 1

Fig: Large Salivary Glands

Location of the glands –

(1) Parotid gland: Below the external acoustic meatus, between the ramus of the mandible and the sternomastoid. It is the largest salivary gland situated below the external acoustic meatus, between the ramus of the mandible and the sternomastoid.

(2) Submandibular gland: In the anterior part of the digastric triangle. They are a pair of walnut-sized glands located on each side of the face beneath and in front of the lower jaw at the back of the mouth.

(3) Sublingual gland: It lies above the mylohyoid, below the mucosa of the floor of the mouth, medial to the sublingual fossa of the mandible and lateral to genioglossus. They are situated under the tongue, bordered laterally by the mandible and medially by genioglossus muscle.

Sites of the opening of ducts –

(1) Parotid duct: Opens into the vestibule of the mouth, opposite the crown of the upper 2nd molar tooth. It is a thick-walled duct about 5 cm long emerges from the middle of the anterior border of the parotid gland.

(2) Submandibular duct: Opens on the floor of the mouth, on the summit of the sublingual papilla, at the side of the frenulum of the tongue. It is approximately 5-6 cm in length and has a diameter of approximately 1-3 mm on conventional sialographic images.

(3) Sublingual ducts:  Open directly into the floors of mouth on the summit of the sublingual fold.

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