Abstract
It is a characteristics of all living individuals that they continuously consume energy and produce heat. Chemical energy is converted into a form of energy that can be used by the individual. Subsequently this energy is used for maintenance of the body: contraction of heart muscle, excretion of products by liver and kidney, and so on. The energy used for these processes is finally given off as heat. Energy can be used for activity and external work. All energy used for activity is given off as heat, and during the process of external work, part of the energy consumed is given off as heat. When the individual is nursed outside the thermoneutral environment (vide infra), energy is used especially for heat production.
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Sauer, P.J.J. (1991). Neonatal Energy Metabolism. In: Cowett, R.M. (eds) Principles of Perinatal-Neonatal Metabolism. Springer, New York, NY. https://doi.org/10.1007/978-1-4684-0400-5_30
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