Answer to Human Circulatory: Hot Water Heating Analogy

ANSWER TO ANALOGUE MODEL - (add your own items or additional categories...)

Human Circulatory System: Hot Water Heating System:

veins & arteries (blood vessels): PIPES

BLOOD : water

oxygen : HOT WATER OR THERMAL ENERGY

HEART : pump

lungs (ADDS OXYGEN TO BLOOD) : FURNACE OR, BETTER, BOILER (HEATS WATER)

CAPILLARIES : radiators

NERVES/HORMONES? : thermostat

NOT NEEDED : overflow tank

(BLOOD VESSELS CAN EXPAND BUT METAL PIPES DON'T - OR EXPAND TO LIMITED EXTENT!)

blood pressure : WATER PRESSURE

white blood cells : NOT REALLY APPLICABLE?

carbon dioxide : COLD WATER?? (NOT REALLY ANALOGOUS)

kidneys : REPAIRMAN - DRAINS AND REFILLS SYSTEM WITH CLEAN WATER?

intestine (ADDS FOOD, SUGAR?...) : NOT APPLICABLE?

DE-SCALING AGENT  : CHOLESTEROL-REDUCING DRUG...