Posted by Josh on Sunday, November 11, 2012 at 2:08pm.
zero. skin is epidermis, which is not in your lungs.
No i mean, like the stuff that covers your alveoli
Use a fake name, Josh. Such as butterfly, or sister2, or honeybeebob. The purpose we have it is to track students questions if they have a followup.
A typical pair of human lungs contain about 700 million alveoli, producing 70mē of surface area.
area of each alveoli=totalarea/totalnumber
areaeach=70m^2/700million
= 70*10^6 cm^2/700*10^6
= .1 cm^2
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