Contents

1. Salient Features and Classification

1. Arthropoda    

2. Mollusca

3. Echinodermata 

2. Study of Arthropoda, Mollusca, Echinodermata

1. Arthropoda    

2. Mollusca

3. Echinodermata 

3. Study of Starfish   

1. Systematic Position, Habit and Habitat

2. External Characters (Oral and Aboral Surface)     

3. Body Wall     

4. Endoskeleton  

5. Section of an Arm   

6. Coelom  

7. Digestive System    

8. Water Vascular (Ambulacral) System    

9. Locomotion    

10. Circulatory System 

11. Respiratory System 

12. Excretory System   

13. Nervous System     

14. Sense Organs 

15. Reproductive System

16. Life History and Development   

17. Metamorphosis

18. Regeneration and Autotomy