28.Flame cells for osmoregulation are found in: A. Aschelminthes B. Platyhelminthes C. Mollusca D. Echinoderms
Option B.A flame cell is a specialized excretory cell found in the simplest freshwater invertebrates such as flatworms. Flame cells function like a kidney and removes waste materials. Bundles of flame cells are called protonephridia. The function of these cells is to regulate the osmotic pressure and maintains ionic balance.
