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bearhunter [10]
3 years ago
11

Can someone help me with this

Biology
1 answer:
VLD [36.1K]3 years ago
4 0
From my understanding, #1 a) the large rectangle represents the heart. For b) the arrows in the model represent the direction of blood flow c) No, the % of oxygen does not stay constant throughout. I’m a biology major. If you need more help on this, post another question and message me the link. :)
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