what is the energy consumption per minute by heart for every cubic milli metre of muscle it has ?

Answer 1

Energy consumption is closely tied to oxygen consumption. For the heart, this varies according to cardiac output. At rest, it is 8 ml of O2/min per 100 g of heart muscle. If you know the density of heart muscle, you can convert it to cc. During exercise, the O2 consumption increases to 70 ml O2/min per 100 grams muscle. In comparison, the brain consumes 5 ml O2/min per 100 grams of brain tissue.