Question

Fill up the blank spaces appropriately.

Phylum/ Class	Excretory Organ	Circulatory Organ	Respiratory Organ
Arthropoda			Lungs/ Gills/ Tracheal System
	Nephridia	Closed	Skin/ parapodia
	Metanephridia	Open
Amphibia		Closed	Lung

Answer 1

Excretory and circulatory organs in Arthropods

Phylum/ Class	Excretory Organ	Circulatory Organ	Respiratory Organ
Arthropoda	Malpighian tubules	Open	Lungs/ Gills/ Tracheal System

Phylum possessing nephridia, closed circulatory system, skin/ parapodia

Phylum/ Class	Excretory Organ	Circulatory Organ	Respiratory Organ
Annelida	Nephridia	Closed	Skin/ parapodia

Phylum with metanephridia as excretory organ and open circulatory system

Phylum/ Class	Excretory Organ	Circulatory Organ	Respiratory Organ
Mollusca	Metanephridia	Open	Gills/ ctenidium

Excretory organ of amphibians

Phylum/ Class	Excretory Organ	Circulatory Organ	Respiratory Organ
Amphibia	Kidneys	Closed	Lung