Blood flow in kidneys and other organs rgan Approx blood flow A-VO difference (mg/min/g of tissue) (mI/L) Kidney 4.00 12-15 depends on reabsorption of Heart 0.80 96 Brain 0.50 48 Skeletal muscle 0.05 (rest Skeletal muscle 1.00 (max. exercise)Blood flow in kidneys and other organs Organ Approx. blood flow (mg/min/g of tissue) A-V O2 difference (ml/L) Kidney 4.00 12-15 (depends on reabsorption of Na+ ) Heart 0.80 96 Brain 0.50 48 Skeletal muscle (rest) 0.05 - Skeletal muscle (max. exercise) 1.00 -