Fill up the blank spaces in the table below by selecting the correct option.

Phylum/Class	Excretory organ	Circulatory system	Respiratory organ
Arthropoda	A	B	Gills/Book gills
C	Nephridia	Closed	Skin
D	Metanephridia	Open	E

	A	B	C	D	E
1	Green gland	Closed	Mollusca	Annelida	Tracheal system
2	Malpighian tubule	Open	Annelida	Mollusca	Feather like gills
3	Antennary gland	Open	Porifera	Amphibia	Lungs
4	Nephridia	Closed	Mollusca	Annelida	Lungs

• A

  1

• B

  2

• C

  3

• D

  4