Sunday, 26 August 2018

Role of Oral cavity in Mammalian Digestion

Role of Oral cavity in Mammalian Digestion

 Oral cavity is protected by the pair of lips. The lips consist of vascularized, skeletal muscle tissue which are present in sensory nerve endings. Lips help retain food in the mouth as it is being chewed and play a role in phonation. The oral cavity contains the tongue and teeth ( see figure). Mammals can mechanically process a wide range of foods because their teeth are covered with enamel (the hardest material in the body) and because their jaws and teeth exert a strong force.

The oral cavity is consist of saliva, a watery fluid that secrete by least three pairs of salivary glands. Saliva help to moistens food, binds it with mucins (glycoproteins), and forms the ingested food into a moist mass called a bolus. Saliva also contains bicarbonate ions (HCO3), which buffer chemicals in the mouth, and thiocyanate ions (SCN) and the enzyme lysozyme, which kill microorganisms. It also contributes an enzyme (amylase) necessary for the initiation of carbohydrate digestion.


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