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On Food and Nutrition

  • Úrsula Oswald Spring
Chapter
Part of the Pioneers in Arts, Humanities, Science, Engineering, Practice book series (PAHSEP, volume 17)

Abstract

Food serves three basic functions for most living beings. Firstly, food creates energy. Firstly, food creates energy required in the absorption and translocation of nutrients necessary for growth, sustenance, and biological and physical activities of the organism. Secondly, food supplies reducing agents indispensable in synthetic processes inside cells. Thirdly, food purveys the materials – structural and catalytic chemical components of living cells – that are built through anabolism. When one of these functions is absent, living organisms substitute the deficiency with the other functions. Nutrition is the process through which food substances are absorbed and used by living organisms. Commencing with the act of feeding, the process continues with digestion, where proteins are broken down into amino acids. Subsequently, intestines absorb nutrients, which, once integrated, are then distributed throughout the body for assimilation and metabolic transformation within each cell. The last stage is excretion of waste and toxins.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Regional Centre for Multidisciplinary Research (CRIM)National Autonomous University of Mexico (UNAM)CuernavacaMexico

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