Free-living flatworms expel undigested materials through the mouth as they have blind guts: only mouth, no anus. Metabolic wastes can diffuse out through their flat bodies. Freshwater flatworms such as planarians have structures called flame cells that help them get rid of extra water.
Parasitic flatworms excrete their wastes through diffusion.
Like flatworms, roundworms excrete their metabolic wastes through diffusion.
No comments:
Post a Comment