Perienteral Chloragogen Tissue and its Role in Defense in Lumbricid Worms
Annelids are able to express a type of adaptive immunity. The main work in that respect has been done on lumbricids in which the perienteral chloragogenic tissue seems to be the only precursor organ that produces free defense cells and humoral defense factors. In this work we demonstrate morphologically a perivascular localization of phagocytozed radioactively-labeled particles inside the typhlosole, an enteric organ considered as an analog of the gut-associated lymphoid structures of vertebrates. The inflammation-like reactions in the typhlosole after challenge by endotoxin are documented histologically.
KeywordsPrecursor Organ Coelomic Fluid3 Coelomic Cavity Enteric Organ Dorsal Vein
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