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Squirrel Squirrel
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6 years ago
Exchange of gases at the cellular level between tissue cells and blood is an example of:
 
  a. diffusion c. osmosis
  b. internal respiration d. perfusion
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AtlasAtlas
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6 years ago
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Squirrel Author
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6 years ago
Smart ... Thanks!
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Yesterday
You make an excellent tutor!
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2 hours ago
Just got PERFECT on my quiz
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