What is the excretory system of a planarian?
Planaria ,which lives in fresh water ,has two strands of branching excretory tubes that open to the outside of the body through excretory pores .The simple tubular excretory is called protonephridium,Which is a network of closed tubules without internal openings.Tubular system is spread through out the body.Located along the tubulesare bulb like Flame cells
