consider the roles of valves and blood vessel walls in moving blood through the body.if you were give a piece of flexible tubing and a small piece of plastic,how might you design a simple model that would simulate those roles?

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anonymous · Answer

medal for correct answer....please

anonymous · Answer

I'm not quite sure what you're asking.. this is blood flow through the heart, is this just a riddle?

anonymous · Answer

ooh one moment it just paste other things.omg

anonymous · Answer

this is the question please.