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blahfuk5 blahfuk5
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6 years ago
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 fishs
  heart.
  d. the transport of blood from the heart to the fishs
  main body mass.
  e. the flow of blood in gills as opposed to the flow
  of blood in the main body mass of fish.

Question 2

All gills
  a. consist of overlapping rows of filaments.
  b. are external.
  c. are paired.
  d. are associated with a blood transport system.
  e. fit all of these descriptions.
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RANDAWOORANDAWOO
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6 years ago
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blahfuk5 Author
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6 years ago
Thank you soooo very much, it was really helpful and kind of you to answer my q's
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#3
6 years ago
You're welcome, once again
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