Flatworms possess excretory organs known as nephridia. Specifically as annelids, flatworms possess a variant known as metanephridia.
Answer:
Carbon reservoirs are underground oil or gas trap that form reees.clastic limestones etc.This is the most earths carbon stored in rocks and sediments.Ocean,Biosphere,Soil Carbon are some examples of carbon reservoirs.
Mostly any bug you can think of
