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What are the Characteristics of Phylum Echinoderm?
- Echino derms are triploblastic and coleomate animals and have radial Symmetry.
- Body has more than two cell layers, tissues and organs.
- Body cavity a true coelom.
- Most possesses a through gut with an anus.
- Body shape highly variable, but with no head.
- Nervous system includes a circum-oesophageal ring.
- Has a poorly defined open circulatory system.
- Possesses a water vascular system, which hydraulically operates the tube feet or feeding tentacles.
- Without excretory organs.
- Normally possesses a subepidermal system of calcareous plates
- Marine and regeneration power development.
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