Question

Difference between protonephridia and metanephridia

Answer 1

Explanation:

Protonphridia is a network of dead-end tubules, found in the phyle platyhelminthes, Nemertea, Rotifers and chordates. The ends are called flame cells.The terminal cells are located at the blind end of the protonephridium. Protonephridia are genarally found in basal organism such as in case of flatworms.

Metanephridia  is a gland involved in excretion, mainly found in invertebrates such as annelids, arthropods and mollusca. Generally metanephridia are a ciliated funel, which opens into the body cavity. This opening connects to a duct which is folded and expended.It ciliated present tubules, toxin and useless hormone.