What substance is mixed with food in the mouth during chewing by the teeth?

Academic Biology NCERT Class 10

Saliva is mixed with food in the mouth during chewing by the teeth.

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Updated on: 27-Mar-2023

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What are the different types of teeth present in our mouth?
When a person puts food in his mouth, then teeth cut it into small pieces, chew and grind it. The glands A in the mouth secrete a substance B which is mixed with the food by tongue. The substance B contains an enzyme C which starts the digestion of food in the mouth. The slightly digested food from the mouth goes down a tube D. The special type of movements E in the walls of tube D push the food into stomach for further digestion. The stomach wall secretes gastric juice containing three substance F, G and H. One of the functions of F is to kill bacteria which may enter the stomach with food. The substance G protects the inside layer of stomach from the damaging effect of substance F whereas substance H is an enzyme for digestion. The partially digested food then enters into small intestine for further digestion.(a) What is (i) gland A (ii) substance B, and (iii) enzyme C?(b) Name the tube D.(c) What is the movement E known as?(d) What are (i) F (ii) G, and (iii) H?
What kills bacteria in our food in the mouth and stomach?
How many teeth are present in a human mouth?
If the teeth are not cleaned regularly, they become covered with a sticky yellowish layer W of food particles and bacteria. Since layer W covers the teeth, the alkaline liquid X secreted by glands Y inside the mouth cannot reach the teeth surface to neutralize the acid formed by the action of organisms Z on sugary food, and hence tooth decay sets in.(a) What is W known as?(b) What is (i) X, and (ii) Y?(c) What are organisms Z?(d) State one way of removing layer W from the teeth.
Explain the role of mouth in digestion of food.
The teeth of the first set that grew during infancy are called(a) permanent teeth(b) milk teeth(c) starting teeth(d) all of these
What do you mean by permanent teeth and milk teeth?
What is the main function of the teeth?
The process of digestion of food is humans begins in:(a) stomach (b) food pipe (c) mouth (d) small intestine
What is meant by a substance?
The teeth of the second set that replace the milk teeth are known as (a) permanent teeth(b) temporary teeth(c) milk teeth (d) hard teeth
Which part of the digestive canal is involved in:(i) absorption of food _____.(ii) chewing of food _____.(iii) killing of bacteria _____.(iv) complete digestion of food _____.(v) formation of faeces _____.
What is food preservation and how to preserve the food from spoilage by microorganisms?
How does food move in the opposite direction during Vomiting?

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