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PYQ 1200 Q/A Part - 1
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Kerala PSC General Science Book Study Materials Page 430
Book's First Page Teeth chop food into small pieces, which Tongue are moistened by saliva before the tongue and other muscles push the food into the It is a fleshy and muscular sensory organ, pharynx. and the very first sensory information is received via the taste buds on its surface. Teeth It also helps to push food toward the posterior part of the mouth for Teeth are made of a bone-like material swallowing. called dentin, which is covered by the The outside of the tongue contains many hardest tissue in the body enamel. rough papillae for gripping food as it is The number of teeth in an adult person is moved by the tongue’s muscles. 32. The taste buds on the surface of the tongue It designed for cutting and grinding food detect taste molecules in food and connect into smaller pieces. to nerves in the tongue to send taste information to the brain. Salivary Glands It produces a watery secretion known as saliva. It helps to moisten food and begins the Incisors are the teeth in the very front. digestion of carbohydrates. They’re the sharpest teeth, built to cut food The body also uses saliva to lubricate food and shaped to shovel the food inward. as it passes through the mouth, pharynx, and esophagus. Canine teeth are in the corners of your mouth. Because they’re meant for grasping and Pharynx (throat) tearing food, they have very long roots. It is a funnel shaped tube connected to the Premolars are located just behind your posterior end of the mouth. Canine teeth. Premolars have a more flat It helps in passing chewed food from the chewing surface because they’re meant for mouth to the esophagus. crushing food. Air from the nasal cavity passes through the pharynx on its way to the larynx and Molars are the last teeth towards the back of eventually the lungs. your mouth. Molars are much bigger than the Premolars and have bigger, flatter chewing surfaces because their job is to chew and grind the food into smaller pieces. 429