Krogh constants for diffusion of nitrogen and carbon monoxide in bladder tissue

We have measured diffusion of N2 and CO through the walls of urinary bladders of cats. The excised bladders were inflated with various gas mixtures and suspended in air. Values of the Krogh diffusion constants at 37 degrees C are 1.14 X 10(-5) for N2, and 1.79 X 10(-5) for CO (units are cm2-min-1-atm-1 and standard errors are less than 10% of the values).