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प्रश्न
State the four ways in which saliva is useful to us.
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उत्तर
The four ways in which saliva is useful to us are:
1. Moistens and lubricates the oral cavity and the tongue to make speaking and swallowing easy.
2. Acts as a solvent, dissolving some part of food to stimulate the taste
3. Cleans the mouth and destroys germs
4. Initiates digestion by converting starch into a simpler form, maltose.
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