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CM BOA - Chapitre 3 : Les spongiaires ou Porifera

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Cours Magistraux de Biologie des Organismes Animaux Professeur : Phillipe MORA Licence 1 : Sciences de la Vie et de la Terre - Parcours chimie biologie Chapitre 3 : Les spongiaires ou Porifera - Caractéristiques générales des spongiaires - Structure fondamentales des éponges : le cas ...

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  • December 29, 2023
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  • 2021/2022
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  • Phillipe mora
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Chapitre 3 : Les spongiaires ou Porifera
I. Caractéristiques générales
A. Aspects généraux
Métazoaires, diploblastiques, pas de réelle symétrie, pas d’organe, présence d’un squelette,
pas de système nerveux, corps comportant de très nombreux orifices (pores).

B. Mode de vie
Animaux aquatiques, vie fixée, animaux filtreurs.

II. Structure fondamentale des éponges : le cas de l’Olynthus
A. Aspect général



: filtration

L’oscule (ou pore exhalant) est unique.




B. Structure de la paroi




Le pinacocyte est une
barrière entre l’extérieur et
l’intérieur.


L’endoderme est formé
d’une seule couche et d’un
seul type de cellule qui
sont les choanocytes.




CM Biologie des organismes animaux

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