describe how the digestive, circulatory, respiratory and excretory systems interact in supplying matter and energy to body cells and in removing waste?

Answer 1

http://digestive.niddk.nih.gov/ddiseases/pubs/yrdd/

Answer 2

I can't understand my Homework so I scan it on google so I clicked here and I see that there is no answer of my Question. 👎🏻☹