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Echinoderms are fascinating marine animals characterized by their prickly and bumpy skin covering an endoskeleton. They possess a remarkable water vascular system with hydraulic canals that lead to tube feet, enabling movement, feeding, and gas exchange. As larvae, echinoderms exhibit bilateral symmetry, while adults display radial symmetry, maintaining a consistent appearance from any angle. They are classified as deuterostomes with a true digestive system. Notable examples include brittle stars, sea stars, sea urchins, sea cucumbers, and more.
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Echinoderms • These are marine animals, and they have a thin layer of skin over laying an endoskeleton. They are prickly and bumpy. • Have a water vascular system • These are hydraulic canals that branch into tube feet which are responsible for movement, feeding, and gas exchange. • As larvae they have bilateral symmetry (they are symmetrical on either half). As adults they have radial symmetry (they always look the same no matter which way you look at them). • Echinoderms have a true digestive system, in fact they are deuterostomes. • Clever way: • Twinkle twinkle little sea star, • Rough and bumpy that you are • You have two kinds of symmetry, • You’re a deuterosome like me. • Twinkle twinkle little sear star, • Rough and bumpy that you are.
Examples Brittle Star Sea Stars Sea Urchin Sea Cucumber Feather Star Sand Dollar Sea Daisy
