title: [Ultrastructure of the lateral vessel walls of the tube of Bonellia (Bonellia viridis, Echiuridae)].
abstract: The present studies show the presence of a singular structure: a myoepithelial syncytium with the bases of the cells being embedded in a hypertrophied basal lamina containing collagen, in which bundles of muscular fibers also penetrate. The cells forming a vascular pseudo-endothelium are probably immobilised haemocytes.
mesh_terms: D000818:Animals; D001808:Blood Vessels / Q000166:cytology / Q000648:ultrastructure; D003094:Collagen / Q000378:metabolism; D011077:Polychaeta / Q000033:anatomy & histology / Q000196:embryology / Q000648:ultrastructure*
chemical_list: D003094:Collagen
vernacular_title: Sur l'ultrastructure de la paroi des vaisseaux latéraux de la trompe de la bonellie (Bonellia virdis, echiuridae)