Organ-Tissue Level Model of Resting Energy Expenditure Across Mammals: New Insights into Kleiber's Law

Table 3

The 𝐾-M and (K × 𝑇)-M functions for five organs/tissues across 111 mammals.

	(K-𝑀) function	(K × 𝑇 )-𝑀 function
Liver	𝐾𝐿 = 683.9 × 𝑀^−0.2677; 𝑟=0.975	𝐾𝐿 × 𝑇𝐿 = 19.56 × 𝑀^0.6046; 𝑟=0.9694
Brain	𝐾𝐵 = 446.6 × 𝑀^−0.1423; 𝑟=0.961	𝐾𝐵 × 𝑇𝐵 = 4.82 × 𝑀^0.6446; 𝑟=0.9538
Heart	𝐾𝐻 = 890.3 × 𝑀^−0.1181; 𝑟=0.855	𝐾𝐻 × 𝑇𝐻 = 5.16 × 𝑀^0.8137; 𝑟=0.9830
Kidneys	𝐾𝐾 = 689.7 × 𝑀^−0.0833; 𝑟=0.848	𝐾𝐾 × 𝑇𝐾 = 4.35 × 𝑀^0.7441; 𝑟=0.9825
Residual	𝐾𝑅 = 29.96 × 𝑀^−0.1667; 𝑟=0.827	𝐾𝑅 × 𝑇𝑅 = 28.16 × 𝑀^0.8402; 𝑟=0.9996

Abbreviations: 𝑀: body mass (in kg); 𝐾𝐿,𝐾𝐵,𝐾𝐻,𝐾𝐾 and 𝐾𝑅: specific resting metabolic rate of liver, brain, heart, kidney and residual, respectively (all in kcal/kg per day).