Zoology 9th Edition by Stephen Miller

تمرين 1

Distinguish between a protonephridium and a metanephridium. Name a class of annelids whose members may have protonephridia. What other phylum have we studied whose members also had protonephridia? Do you think that metanephridia would be more useful for a coelomate or an acoelomate animal? Explain.