asked 49.9k views
2 votes
During exercise, the __________ use oxygen faster, so the _________ have to work harder.

A. lungs, muscles
B. muscles, lungs
C. muscles, glucose
D. glucose, lungs

asked
User Dalal
by
9.3k points

1 Answer

5 votes
A as the lungs take in oxygen and give it carbon dioxide
answered
User Jnd
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