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JulijaS [17]
3 years ago
15

Why does the blood returning to the heart have very little oxygen in it​

Health
2 answers:
Colt1911 [192]3 years ago
7 0

Because the cells throughout the body use up most of the oxygen before It can make its way back.

Dovator [93]3 years ago
3 0

because once the blood that received oxygen gets back to the heart, the oxygen gets moved to vital organs in your body from your bloodstream

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