Echinoderm - Wikipedia, the free encyclopedia
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Echinoderms (Phylum Echinodermata ) are a phylum of marine animals. Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone. Aside from the problematic Arkarua , ...
en.wikipedia.org/wiki/Echinoderm
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Sea star - Wikipedia, the free encyclopedia
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Sea stars (also often called " starfish ") are echinoderms belonging to the class Asteroidea . The names "sea star" and "starfish" essentially refer to members of the Class Asteroidea. However, c...
en.wikipedia.org/wiki/Sea_star
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Summary phylogenetic hypothesis of the Echinodermata, ... In echinoderms, it is composed of: a thickened vessel (the "heart") lacking an endothelium and surrounded by a pericardium; a region where ultrafiltration occurs via podocytes; a closed circulatory system; and an opening to the external environment called the madreporite.
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tolweb.org/Echinodermata
tolweb.org/Echinodermata
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Phylum Echinodermata [hedge-hog skin]. ... The water vascular system operates through water pressure to manipulate sucker-tipped tube feet used to hold onto the substrate and in locomotion. Although echinoderms do not have a circulatory system, they have a hemal system which is thought to help distribute food to various parts...
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bioweb.wku.edu/courses/Biol225/225lab9.html
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sea urchins scrape algae from rocks with five large teeth arranged in a structure known as "Aristotle's lantern." Echinoderms (except holothurians) generally lack respiratory systems, and many have only rudimentary circulatory systems; ... Source: Hyman, L. H. 1955. The Invertebrates. Volume IV: Echinodermata. McGraw-Hill,
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www.ucmp.berkeley.edu/echinodermata/echinomm.html
www.ucmp.berkeley.edu/echinodermata/echinomm.html
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Echinoderm Printouts: These spiny-skinned invertebrates have five-fold symmetry and live on the ocean floor. ... These slow-moving creatures have a water-vascular system (a rudimentary circulatory system), water-filled channels that go through the body. ... Classification: Kingdom Animalia (animals), Phylum Echinodermata.
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www.enchantedlearning.com/subjects/invertebrates/echino...
www.enchantedlearning.com/subjects/invertebrates/echinoderm/
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Circulatory system: nonexistent. Excretory system: nonexistent. Nervous system: simple, nerve network without ganglia or cephalization. Types of reproduction: sexual, with larval stage. Echinodermata review done?
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www.biology-questions-and-answers.com/echinodermata.htm...
www.biology-questions-and-answers.com/echinodermata.html
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THE CIRCULATORY SYSTEM ... There are several types of circulatory systems. The open circulatory system ... Vertebrates, and a few invertebrates, have a closed circulatory system, shown in Figure 2. Closed circulatory systems (evolved in echinoderms and vertebrates) have the blood closed at all times within vessels of...
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www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookcircS...
www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookcircSYS.html
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The phylum Echinodermata is an extremely large, well-known phylum ... In some species, the whole digestive system is changed during metamorphosis, and the organism acquires a new mouth and anus. Internally, echinoderms have a thickened vessel which acts as the heart, pumping blood through a closed circulatory tract.
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www.angelfire.com/mo2/animals1/phylum/echinodermata.htm...
www.angelfire.com/mo2/animals1/phylum/echinodermata.html
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