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प्रश्न
Give reasons for the following:
All teeth in the mouth are not alike.
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उत्तर
The dentition in animals is based on the type of food they eat. So we have different kinds of teeth.
All teeth in the mouth are not alike as we eat both meat and plants. Due to different types of food eating habits teeth are of different types.
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संबंधित प्रश्न
In which part of the digestive system is water absorbed?
Where is digested food absorbed into blood in human body?
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 neutralise 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.
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Put a tick (✓) against the most appropriate alternative in the following statement.
The teeth which help in tearing the food are the:
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Answer the following question.
Small Intestine is very long and coiled. Even if we jump and run, why it does not get twisted? What can happen if it gets twisted?
Why do we eat?
