.Hi there Kayla,
The internet is a wonderful place. There is a mass of information about most everything on the net.
You want to find out about plant structure and the systems involved in that.
Why not Google it? Searvch on Google for Plant structure amd see what hits you get.
Even if one hit/result doesn't answer your question, it can sometimes give you an idea about what else to search for
Why not search on "plant structure" with Google. Google is your friend