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Let’s Recall
Tongue and teeth are the two important organs present inside our mouth.
Tongue is a sense organ and helps us taste different kinds of food.
Teeth help us bite and chew food. They help us to speak clearly and give shape
to our faces.
We have two sets of teeth - milk teeth or temporary teeth and permanent teeth.
Incisors, canines, premolars and molars are the four kinds of teeth.
Enamel, dentine, pulp, root and cementum are the different parts of the teeth.
Microbes are tiny living organisms that cannot be seen with the naked eye.
There are four kinds of microbes – bacteria, viruses, protozoa and fungi.
We must take care of our tongue and teeth.
Key Words
teeth tongue taste buds sweet
salty sour bitter jaw gums incisors
canines premolars molars crown neck
root enamel dentine cementum pulp cavity
microbes bacteria virus protozoa fungi
Let
Let’s Exercise
er
cise
’
s Ex
I. Choose the correct option.
1. What helps us taste our food?
a. teeth b. tongue c. mouth d. lips
2. The are the hardest organ of our body.
a. teeth b. bone c. gums d. pulp
3. The number of permanent teeth is .
a. 18 b. 12 c. 32 d. 20
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