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Vaccination:
Now let us see how vaccination protects us from disease. We have mentioned above that the W.B.Cs. produce antibodies which neutralise the toxins produced by the invaders. These W.B.Cs. are of different kinds and each kind consists of millions of cells which recognise and combat a specific foreign invader. Once a class of W.B.Cs. has encountered a particular kind of invader, it develops memory and is thus trained to ward off future attacks. In this way the body becomes "immune" to that infection and the process is called immunisation. Thus, our body regularly develops natural immunity as a variety of fighting cells are produced by actual attacks of infectious agents. Artificial immunisation is a clever idea. It is done through "vaccination", that is by artificial introduction into the body of a weak infection, which triggers off a defence mechanism, and produces W.B.C. trained to combat that particular infection.
Formation of the solar system: This theory is based on the assvmption that the Sun and all the planets were formed from a huge rotating cloud df interstellar gas and dust.
Define the Pons Varolli Look at Figure Situated in front of the cerebellum below the midbrain and above the medulla oblongata, is the pons. It is involved in motor control and
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Maintain the Calcium Levels of Body– Function of Kidney Maintain the body’s calcium levels. Along with parathormone and calcitriol, kidney helps the body to absorb calcium.
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Adulteration of food: We live in a society where some times foods and even medicines are sold in an adulterated form by mixing it with other materials, which are neither food
Define the functions of the Macrophages The macrophages: 1) phagocytose microorganisms and inert particles 2) secrete IL-1 (Interlukin I), TNF (tumor necrosis factor),
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