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32. Fill up the blank spaces appropriately

Phylum/Class

Excretory Organ

Circulatory Organ

Respiratory Organ

Arthropoda

 

 

Amphibia

 

Nephridia

Metanephridia

 

 

Closed

Open

Closed

Lungs/Gills/ Tracheal System

Skin/Parapodia

 

Lung

 

 

Excretion involves the elimination of metabolic waste products from the animal body.
Different organs are involved in the process of excretion in different animals.
(a) In Arthropods,the Malpighian tubules remove excretory products from haemolymph.
(b) In Annelids, the excretory organ occurs as segmentally arranged coiled tubules called nephridia.
(c) In Molluscas, excretion occurs by paired structures called organ of Bojanus also called metanephridia.
(d) In Amphibians mesonephric kidneys are associated with excretion.

Blood circulation involves the circulation of blood and lymph along with oxygen, carbondioxide, hormones, blood cells, etc, within the body system for the nourishment of cells, fighting diseases, and for stabilising body temperature and pH.

 

Open Circulation

Closed Circulation

In this, blood is pumped out of the heart into sinuses which directly open into cells and tissues, e.g., phylum-Arthropoda,  and Mollusca.

In this system, blood is circulated through a series of complexly arranged vessels and capillaries eg, phylum-Annelida and Class-Amphibia.

 

Respiratory organsare involved in the exchange of gases from the atmosphere. Different respiratory organs are as follows

(a) Lungs/gills/tracheal system in arthropoda and molluscs.

(b) Skin in annelids.

(c) Lungs and skin in amphibians.

 

 

 

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