. The animal as a machine and a prime motor, and the laws of energetics. Animal mechanics; Force and energy. THE ANIMAL AS A MOTOR. 71 (4) Produce muscular and intellectual energy for the work it has to do. The body is built up and its wastes are repaired by the nutrients. The nutrients also serve as fuel to warm the body and supply it with strength. A growing child or young animal requires much muscle and nerve-making material, and the proportions of the several elements in the food are more nearly those of the body itself than in the case of the adult. The adult, when doing little work, requ
. The animal as a machine and a prime motor, and the laws of energetics. Animal mechanics; Force and energy. THE ANIMAL AS A MOTOR. 71 (4) Produce muscular and intellectual energy for the work it has to do. The body is built up and its wastes are repaired by the nutrients. The nutrients also serve as fuel to warm the body and supply it with strength. A growing child or young animal requires much muscle and nerve-making material, and the proportions of the several elements in the food are more nearly those of the body itself than in the case of the adult. The adult, when doing little work, requires little food, and that mainly of the kinds which are required to supply heat and to compensate the slight wastes of tissue then occurring; while the working system, and particularly if hard worked, demands considerable quantities of combustible, heat-producing food. Simi- lar differences of dietary are required, as the climate compels the development of more or less of caloric to preserve the temperature of the body, which at above 104" Fahr., or a little below 98", fails to meet the requirements of hfe. According to Dr. Letheby, the working-power of the human body may be taken as follows :. ( are consumed for fuel. The carbohydrates j are changed into fat. of food \ are consumed for fuel. forms the nitrogenous basis of blood, muscle, sinew, bone, skin, etc. is changed into fats and carbohydrates. is consumed for fuel. * Letheby on Food, p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Thurston, Robert Henry, 1839-1903. New York, J. Wiley & Sons
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforcean, bookyear1894
