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The vomiting centre and the chemoreceptor trigger zone—both located in the medulla oblongata.
6-A typical pair of human lungs contains about 700 million alveoli. Thus, on an average around 350 million alveoli are present in each lung.
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10-Physiological value of carbohydrates is 4.0 kcal/g, proteins 4.0 kcal/g and of fats is 9.0 kcal/g.