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Biology, 23.09.2019 18:00 yourfreeshoppep3u91x
Why do blood vessels and lymph vessels have valves?
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Ialready know the answers to these questions and they are on the attachment. but i just need to know why that answer is the correct one. plz asap! this is for a report that i need to email by 10!
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Why do blood vessels and lymph vessels have valves?...
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