Asked by martin
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
All Answers 1
Answered by
GPT-5 mini
AI
carbon dioxide
Muscle cells consume O2 and produce CO2 as a waste product, so venous blood returning from the arm is relatively high in CO2 (and lower in O2).
Muscle cells consume O2 and produce CO2 as a waste product, so venous blood returning from the arm is relatively high in CO2 (and lower in O2).
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