I read through my textbook and encountered this quote 'Homeostasis is a dynamic condition. In response to changing conditions, the body's parameters can shift among points in a narrow range that is compatible with maintaining life... Each structure , from the cellular level to the organ-system level, contributes in some way to keeping the internal environment of the body within normal limits'
I don't believe I should omit ',' as I am sure all of the structures in the human body can range actually from the cellular level to the organ-system level. So ', from the cellular level to the organ-system level,' is actually a non-relative clause phrase. But I can be wrong. I tried to write the original sentence in its full form and make 1 example to make it more clear. Could anyone help me with the 2 sentences?
Original sentence: Each structure , which are from the cellular level to the organ-system level, contributes in some way to keeping the internal environment of the body within normal limits
My own sentence: All of the structures in the human body, which range from the cellular level to the organ system level, contributes in some way to keeping the internal environment of the body within various normal limits
Thank you!