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1 vote
What is the most efficient way to extract oxygen from the environment?

a. Countercurrent
b. Crosscurrent
c. Uniform pool

1 Answer

5 votes

Answer:

a. Countercurrent

Step-by-step explanation:

Countercurrent has been adapted from fish gills where the air is drawn from the blood flowing in the opposite direction to the water flowing to the gills.

User Dmitry Kochin
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