Energy expenditure body organs

Table 2.8 Metabolic rate of different organs or tissues in an adult human and contribution of the different organs and tissues to whole-body resting energy expenditure, (REE) in an adult male, female and a six month old child...

The energy intake by an organism plus or minus any change in body mass or composition. Lifson and McClin-tock introduced the use of doubly labeled water ( H20 and H2 0) to estimate energy expenditure. In this strategy, is lost from the body as labeled water and carbon... 

The characterization of energy balance in cells and tissues relies upon the measurement of several variables oxygen and substrate consumption, lactate and carbon dioxide production. These measurements however give only indirectly and partly quantitative information about the energy balance in obesity. Whole body calorimetry and direct measurement of cell heat production have been introduced as a complement to the assessment of energy balance in the whole organism and energy expenditure on the cellular level. 

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