Echinoderms are distinguished by a water vascular system aiding locomotion, food capture, transport, and respiration; they lack an excretory system.
The most distinctive feature of echinoderms is the presence of water vascular system which helps in locomotion, capture and transport of food and respiration. An excretory system is absent.
| Text | The most distinctive feature of echinoderms is the presence of water vascular system which helps in locomotion, capture and transport of food and respiration. An excretory system is absent. |
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