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Zoologie

TermDefinition
Le squelette interne dermique Le squelette est discontinu. On peut trouver sur son tégument : - des épines qui sont articulées, - des pédicellaires qui peuvent prendre la forme de pinces à sucre, et lui servent à nettoyer son tégument. - des pieds ambulacraires
Le système nerveux épithélioneurien Le système nerveux est superficiel et peu distinct du tégument.
La symétrie pentaradiée La larve Pluteus a une symétrie bilatérale nette avec des cavités cœlomiques. Celles ci vont se fractionner pour donner 5 vésicules à l’origine des cavités corporelles de l’adulte.
Le système digestif
Created by: Rakkikuroba
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