Biology, 09.12.2020 01:00 jonnycampbell223
Veins take blood back to the heart. Which gas would be most abundant in a vein that takes blood from muscle cells in the arm back to the heart?
carbon dioxide
oxygen
nitrogen
hydrogen
Answers: 2
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Answers: 3
Veins take blood back to the heart. Which gas would be most abundant in a vein that takes blood from...
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