学龄前儿童所需的营养（For preschool children s nutrition）.docVIP

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学龄前儿童所需的营养（For preschool children s nutrition）.doc

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学龄前儿童所需的营养（For preschool children s nutrition）

学龄前儿童所需的营养（For preschool children s nutrition） Preschool children are the key to long stature, so what kind of nutrition should be added to the children at this stage? The following article is for you to parse. Preschool childrens need for water Water is an indispensable condition for human existence. Regardless of any nutrients in the body of the digestion and absorption, translocation and excretion, and water related; water also constitute the main substance of human tissue; water can not only regulate body temperature, and can quench your thirst. The body of water along with age, sex, weight vary. The smaller the age, the more water content in the body; the more adipose tissue, the less water content; therefore, obese people tend to have less water content. The amount of water needed depends mainly on the bodys metabolism and the need for heat. In addition, changes in temperature, the amount of human activity, and the nature of food also affect the amount of water needed. For preschool children, the daily requirement of water per kilogram of body weight is 90~100 ml.. Diarrhea, vomiting, drainage increased, the amount of water demand is relatively increased. There are 3 sources of water supply in the body: one is the amount of liquid to drink; two, the amount of water contained in the food; three is the water produced by oxidation of carbohydrates, fats and proteins in the body. There are 3 pathways to the discharge of water in the body: one is through the kidneys, two through the skin and lungs, and three through the intestine. The daily water turnover of children is faster than that of adults, which is beneficial to the excretion of metabolites in the body. But the tolerance to water shortage is worse than that of adults, and water imbalance is prone to occur in adults. When water intake is insufficient, dehydration can occur; conversely, when the intake of too much fluid, there may be edema. Preschool childrens need for heat energy Heat energy is an important