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Linhlinh Linhlinh
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6 years ago
The process in which oxygen-rich blood diffuses into tissue cells is
 a. exhaling b. external respiration
  c. internal respiration d. breathing
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achurchachurch
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6 years ago
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Linhlinh Author
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6 years ago
Thank you, thank you, thank you!
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Yesterday
Just got PERFECT on my quiz
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2 hours ago
You make an excellent tutor!
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