Digestive System — BIOLOGY STD 9 — Question

Salivary Glands - Three pairs in man and secrete 1000 to 1500 cc saliva per day. Saliva is slightly acidic and its pH is 6.8.

There are three types of salivary glands:

1. Parotid glands: It is the largest salivary gland and situated near the ears. It opens into oral cavity by Stenoson's duct.
2. Sublingual glands: It is located beneath the tongue. It opens into the floor of oral cavity by duct of Rivinus.
3. Submadibular or sub-maxillary glands: It is situated at the angles of the lower jaws. It opens inot oral cavity by Whartson's duct.

Each gland secret secretes saliva which is transported to the mouth cavity. At the time secrete saliva.