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I need the answers please

I need the answers please
asked 181k views
3 votes
I need the answers please

I need the answers please-example-1
asked
User Ostkontentitan
by
8.2k points

1 Answer

2 votes

Answer:

Open circulatory system:

Relies on the heart to keep blood flowing

Used in all vertebrates

Sorry thats all i know :)

answered
User Luke B
by
8.1k points
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