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Digestion in the Mouth
The mouth receives food. The tongue serves in swallowing, manipulating the food for chewing and in perceiving taste. The teeth mechanically subdivide the food for easier digestion. Then, there are the salivary glands. There are three pairs of salivary glands namely parotid, submaxillary and sublingual which secrete the colourless viscous fluid called 'saliva'. Saliva helps in swallowing the food by lubricating the food and the neutral pH of saliva prevents the decalcification of teeth
What is a hormone? A hormone, as you may already know, can be described as a chemical substance which having been formed in one particular organ or a gland is carried in the bl
types, principle and working
Will we ever go beyond The Milky Way to explore other galaxies?
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Water Pollution Pollution of fresh water is one of the most serious environmental problems of the world as a whole. In our country most of the rivers and lakes are polluted
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Give reason for the benifits of our technological development not reaching all the strata of our society.
Explain Specific Defence Mechanism In the section on white blood cells, we learnt that whenever a germ or infection enters our body, the WBCs snap to attention and destroy the
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