The osmoregulatory/excretory system of a freshwater flatworm is based on the operation of
A) protonephridia.
B) metanephridia.
C) Malpighian tubules.
D) nephrons.
E) ananephredia.

Question

Quizplus · Accepted Answer

Freshwater flatworms use protonephridia to regulate their osmotic balance and excrete waste products. Protonephridia are a network of tubules with flame cells that filter excess water and waste from the flatworm's body. The filtrate is then released through excretory pores.

The Osmoregulatory/excretory System of a Freshwater Flatworm Is Based on the Operation