Determine (A) the maximum inter-capillary half distance (or critical radius) for skeletal muscle given that the diffusion coefficient of oxygen in the interstitial tissue is 2.0105scm2 and the reaction rate of oxygen in the skeletal muscle tissue is 1107cm3smol. Assume the oxygen concentration at the capillary surface to be constant at 4.05108cm3mol. Assume the capillaries in the skeletal muscle have (external) diameters of 3m. (B) Repeat the same calculations for a capillary in the brain where the reaction rate is 2.34108cm3smol and the capillary diameter is 5m; all other parameters are the same. (Hint: the maximum critical radius occurs at the beginning when z=0. Also, since you were given the surface concentration, you do not need to include the term that accounts for transport across the capillary wall.) (Ans: Rcr,muscle=26.2m )