Why do the lungs need a very good blood supply?
Well it’s kind of the other way around. It’s not so much that your lungs need blood as that all your blood needs your lungs. Your lungs are where the blood in your body goes to “drop off” the carbon dioxide it has picked uo from the rest of your body to be exhaled by your lungs. In the meantime it “picks up” oxygen to take to the rest of your body to supply your body’s tissues with the oxygen they need to survive. That is why there is such a large supply of blood to the lungs.
