1. your heart functions in your body as a(n) a. filter for impurities. b. organ for absorbing vitamins and minerals. c. muscle that to pump oxygen around the body. d. series of joints responsible for endurance.

The answer should be C. Muscle that helps pump oxygen around the body

well when looking at this if you think about it   negativley and positivley   react with each other and when the first layer gets full they add layers it starts with 2 on the first layer and it constantly goes on until the official number is there

yes. i think it is for sure.