Which of the following features does not improve the rate of diffusion?
a. thin membranes li...
Which of the following features does not improve the rate of diffusion?
a. thin membranes lining respiratory organs such as gills and lungs
b. multiple infoldings of respiratory surfaces, such as lamellae in gills
c. inhaled fresh air is mixed with old air from the previous breathing cycle
d. blood circulates in counter current direction to water flow in gills
Answers: 3
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