<prompt> Greatest resting AV difference of oxygen content is in:HeartKidneyBrainSkeletal muscles  <response>: Ans. a Heart. Ref. Ganong, Physiology, 21st ed., 557Circulation through organs:Liver:Largest share of systemic cardiac output.Kidney:Highest blood flow per gram of tissue.Heart:Large arteriovenous 02 difference. HEARTWorkO2 usageml100 gminPulse rateminCO LminStroke vol mlA-VO2 diff mldl Rest267646.41004.3 Educational points: Cardiac output 5000 ml min Cardiac reserve 300 to 400 per cent. Kidney perfusion 1000 mlmin 20 of CO Plasma flow in kidneys 600 mlmin GFR 120 mlmin 20-filtr. fraction Final urine 2000 ml24 hours, i.e. 1.4 mlmin.Resting Blood Flow and O2 Consumption of Various Organs in a 63-kg Adult Man with a mean Arterial blood pressure of 90 mm Hg and an O2 Consumption of 250 mLmin. AV Oxygen Difference mLLOxygen ConsumptionResistance R unitsPercentage of TotalBlood flowRegionMass kgmLminmL100g min mLminmL100 minAbsoluteper kgCardiac outputOxygen consumptionLiver2.6150057.734512.03.69.427.820.4Kidneys0.31260420.014186.04.31.323.37.2Brain1.475054.062463.37.210.113.918.4Skin3.646212.825120.311.742.18.64.8Sleletal musle31.08402.760500.26.4198.415.620.0Heart0.3250184.0114299.721.46.44.711.6Rest of body23.83361.4129440.216.1383.26.217.6Whole body63.054008.6462500.41.063.0100.0100.0Cardiac Output and Regional Blood Flow in a Sedentary Man Quiet StandingExerciseCardiac output5900 mLmin24,000 mLminBlood flow to:Heart2501000Brain750750Active skeletal muscle65020,850Inactive skeletal muscle650300Skin500500Kidney, liver, gastrointestinal tract, etc.3100600 