What is the function of a closed heart valve and what is the difference between a stroke and a heart attack?

what is the function of a closed heart valve?

what is the difference between a stroke and a heart attack?

this is for a project at school Thx Thx!

Written By Evie Neumann

{ 1 comment… add one }
  • Max April 13, 2009, 5:04 am

    saif i think this is colin

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