Answered

Veins take blood back to the heart. Which gas would be most abundant in a vein that takes blood from muscle in the arm back to the heart?

A. carbon dioxide
B. oxygen
C. nitrogen
D. hydrogen



Answer :

GinnyAnswer

Final answer:

Oxygen is the most abundant gas in the vein that takes blood back to the heart.


Explanation:

Oxygen would be most abundant in a vein that takes blood from the arm back to the heart. When blood travels through the body, oxygen is delivered to tissues, and carbon dioxide is picked up. As blood returns to the heart through veins, it carries oxygen-rich blood back for circulation.


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