Question

How do annelid animals differs from arthropods?

Answer 1

Annelids

1. They have a true body cavity called 'coelom.'

2. Body bears lateral appendages for locomotion in the form of setae and Parapodia.

3. Organ differentiation occurs in a segmental fashion, with the segments lined up one after the other from head to tail.

4. They breathe through the body surface.

5. They do not possess a chitinous exoskeleton.

6.They have a closed type of circulatory system.

Arthropods

1. The body cavity is blood-filled and called 'hemocoel.'

2. Jointed legs are there for locomotion.

3. These animals are also segmented but lack complete metameric segmentation.

4. They possess different organs for breathing, like gills, trachea book lungs, etc.

5. Chitinous exoskeleton present.

6. Open type of circulatory system present.