What is the human energy consumption by organ?
Percent of basal metabolic rate by organ (BC Campus Open Education):


Liver and spleen : 27%
Brain: 19%
Skeletal muscle: 18%
Kidneys: 10%
Heart: 7%
Other tissues (lungs, intestine, skin, bone, fat tissue, glands...): 19%




Basal metabolic rate by 1 kg of specific organ tissue (kcal/kg of organ/day) (Table 5 from American Journal of Clinical Nutrition, 2010):


Heart: 440 kcal/kg
Kidneys: 440 kcal/kg
Brain: 240 kcal/kg
Liver: 200 kcal/kg
Skeletal muscle: 13 kcal/kg
Adipose tissue: 4.5 kcal/kg
Residual tissues (lungs, intestine, skin, bone...): 12 kcal/kg