Questions and Answers
What does the word Echinoderm mean?
Spiny Skinned
What is an endoskeleton?
An internal skeleton similar to the kind that vertebrates have.
What do Echinoderms include?
Sea stars, sea urchins, sea lilies, sea cucumbers, brittle stars, and sand dollars.
What type of symmetry do Echinoderms have?
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What type of system do Echinoderms have?
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What are the nerve fibers around the mouth of echinoderms called?
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What is the water vascular system in echinoderms?
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Where do echinoderms live?
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What type of skeleton do echinoderms have?
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Study Notes
Echinoderms Overview
- Echinoderm translates to "Spiny Skinned," indicating their distinctive external appearance.
- Echinoderms are exclusively marine organisms, found solely in ocean environments.
Types of Echinoderms
- Common examples include sea stars, sea urchins, sea lilies, sea cucumbers, brittle stars, and sand dollars.
Symmetry
- Adult echinoderms exhibit radial symmetry, allowing symmetrical arrangement around a central axis.
- They develop from larvae that display bilateral symmetry before maturing into their adult form.
Anatomy and System
- Echinoderms possess an endoskeleton, which is an internal skeleton similar to that found in vertebrates.
- They feature a simple nervous system characteristic of jellyfish, lacking a centralized brain.
- Nerve fibers encircle the mouth, forming a structure known as the Nerve Ring.
Water Vascular System
- The water vascular system is a unique feature of echinoderms, enabling movement, feeding, respiration, and sensory perception through hydraulic pressure and water pumps.
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Description
Test your knowledge of echinoderms with these flashcards. This quiz covers key terms and definitions related to the anatomy and classification of these fascinating marine animals. Perfect for students studying marine biology or zoology.
