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la paroi du corps est composée d'un squelette de spicules et de cellules creuses appelées porocytes qui peuvent s'ouvrir pour aspirer l'eau à travers les porocytes jusqu'à l'atrium qui pointe d'un oscule principal.
the body wall is made stronger by a skeleton of inorganic spicules and hollow cells called porocytes that open to draw water through the porocytes into the atrium which is pushed out a main osculum.
