Countercurrent flow in the respiratory systems
of fish is a mechanism that accounts for
a. oxygen uptake by blood capillaries in the
gills.
b. ventilation across fish gills.
c. the transport of blood from the gills to the
fish's heart.
d. the transport of blood from the heart to the
fish's main body mass.
e. the flow of blood in gills as opposed to the
flow of blood in the main body mass of
fish.
A
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Indicate whether the statement is true or false.
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