Biology, 01.08.2019 01:10, galaxychild101

For gas exchange to be efficient, the respiratory membrane must be
a. 0.5 to 1 micrometer thick
b. between 5 and 6 micrometers thick
c. at least 3 micrometers thick
d. the thickness of the respiratory membrane is not important in the efficiency of gas exchange.

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For gas exchange to be efficient, the respiratory membrane must be
a. 0.5 to 1 micrometer th...