. A civic biology : presented in problems. Biology; Sanitation. 'MIL VAAUt- 315 CAMUS PCI MUM BUTTERMILK FUEL VALUE 165 CALORIES PE P POUND CREAM. Carbohydrates:* 8 C FUEL VALUE: 160COMICS *£• mm —Water Fat: 185- Ash:0-5- -Water: lem:25 Carbohydrates:4 5 The Relation of Environment to Diet. - We are all aware of the fact that the body seems to crave more food in winter than in summer. The temperature of the body is maintained at ° in winter as in summer, but much more heat is lost from the body in cold weather. Hence feeding in winter should be for the purpose of main
. A civic biology : presented in problems. Biology; Sanitation. 'MIL VAAUt- 315 CAMUS PCI MUM BUTTERMILK FUEL VALUE 165 CALORIES PE P POUND CREAM. Carbohydrates:* 8 C FUEL VALUE: 160COMICS *£• mm —Water Fat: 185- Ash:0-5- -Water: lem:25 Carbohydrates:4 5 The Relation of Environment to Diet. - We are all aware of the fact that the body seems to crave more food in winter than in summer. The temperature of the body is maintained at ° in winter as in summer, but much more heat is lost from the body in cold weather. Hence feeding in winter should be for the purpose of maintaining our fuel supply. We need heat- producing food, and we need more food in winter than in summer. We may use carbo- hydrates for this purpose, as they are economical and diges- tible. The inhabitants of cold countries get their heat-releasing foods largely from fats. In tropical countries and in hot weather little protein should be eaten and a considerable amount of fresh fruit used. The Relation of Age to Diet. - - As we will see a little later, age is a factor not only in determining the kind but the amount of food to be used. Young children require far less food than do those of older growth or adults. The body constantly increases in weight until young manhood or womanhood, then its weight remains nearly stationary, varying with health or illness. It is evident that food in adults simply repairs the waste of cells and is used to supply energy. Elderly people need much less protein than do younger persons. But inasmuch as the amount of food to be taken into the body should be in proportion to the body weight, it is also evident that growing children do not, as is popu- larly supposed, need as much food as grown-ups. The Relation of Sex to Diet. - As a rule boys need more food than girls, and men than women. This seems to be due to, first, the more active muscular life of the man and, secondly, to the FuFL VALUE 880 0»LOfilFS » The composition of Please no
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