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Biology Circulation Q

What's the difference between an open and closed circulation system?
I understand how a closed circulation system works because it's in blood vessels but what about open? How can it just flow around the body within nothing to contain it??

Thanks :smile:
Sorry you've not had any responses about this. :frown: Are you sure you’ve posted in the right place? Posting in the specific Study Help forum should help get responses. :redface:

I'm going to quote in Tank Girl now so she can move your thread to the right place if it's needed. :h: :yy:

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