What is difference between Arthropoda and Echinodermata.

Dear student,
Arthropods
- They have a tough , non living, jointed outer shell called exoskeleton to protect their soft bodies.
- They can live in every possible habitat.
- They have jointed appendages.
- They show bilateral symmetry.
- Examples are centipedes, lobsters, spiders, insects etc.

Echinoderms
-They have living endoskeletons which is situated within the deeper skin or body tissues and act as their protective covering.
- They live in marine environments
- Radial symmetry (5 rayed)
- Highly variable body shape, no head.
- Examples are starfish, sea urchins, sea lily etc.
Regards.
 

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