Sea urchin - Wikipedia
Sea urchin anatomy based on Arbacia sp. Urchins typically range in size from 3 to 10 cm (1 to 4 in), but the largest species can reach up to 36 cm (14 in). [4] They have a rigid, usually spherical body bearing moveable spines, which give the class the name Echinoidea (from the Greek ἐχῖνος ekhinos 'spine'). [5]
Sea Urchin Anatomy - Ask A Biologist
2015年8月22日 · Sea Urchin Anatomy. One look at a sea urchin and you can see why they would be called sea hedgehogs. They have hard rounded shells covered with sharp movable spines. Urchins are part of the phylum Echinoderm and their name comes from Ancient Greek (echinos meaning "hedgehog" and derma meaning "skin").
Sea urchin | Description, Anatomy, & Facts | Britannica
2024年11月12日 · Sea urchin, any of about 950 living species of spiny marine invertebrate animals (class Echinoidea, phylum Echinodermata) with a globular body and a radial arrangement of organs, shown by five bands of pores running from …
Sea urchins: Strange and spiny wonders of the ocean
From a fascinating symmetrical structure to deadly-looking spines, unique mouthparts and clever techniques for moving about on the seafloor, discover the extraordinary world of sea urchins. What is a sea urchin? Sea urchins belong to a group of marine invertebrates called Echinodermata, which means spiky-skinned.
Sea Urchin Anatomy: [Parts & Fossils] - Sea Urchins Mag
2023年5月11日 · Each part of the sea urchin’s anatomy plays a crucial role in its survival, locomotion, feeding, and reproduction. The combination of these specialized structures allows sea urchins to adapt and thrive in various marine environments.
Virtual Urchin - Urchin Anatomy - UW Departments Web …
Urchin Anatomy. Title Anatomy Quiz . interactive tutorials. microscope basics. microscope tutorial. microscope measurement. microscope compare. specimen compare. ... Explore the Internal and External Anatomy of the Sea Urchin. Click on the urchin to …
Anatomy - See Urchins
Sea urchins control their tube feet via their water vascular systems. Tube feet exist on the outside of the sea urchin, and are how sea urchins grab and bring food towards their mouth, and move along the sea floor. The ring canal is central to this system, with five radial canals branching out from this central piece along inside of the test ...
Virtual Urchin - Teacher Resources - UW Departments …
This module explores internal and external anatomy of the sea urchin in an interactive tutorial. Predator/Prey This module is an interactive activity that illustrates food chain principles and the sea urchin's function in ecosystems as both predators and prey.
Systematic comparison and reconstruction of sea urchin …
2008年7月23日 · Sea urchins are spherical, oval or flattened free-moving echinoderms covered with spines. Their soft tissue anatomy is characterized by a dominant digestive tract, a varying number of gonads, and the highly specialized water vascular system with its external appendages, the tube or ambulacral feet.
Sea Urchin: The Marine Invertebrate - Ocean Info
Sea urchins are small, spiky creatures found in various habitats, from shallow coral reefs to deep-sea trenches, and they play important roles in the ecosystems in which they live. Approximately 950 species of these creatures live on the seabed of …