A light and electron microscopic study of the ciliated urn of Phascolosoma agassizii (sipunculida).

Autor: Dybas, Linda
Zdroj: Cell & Tissue Research; 1976, Vol. 169 Issue 1, p67-75, 9p
Abstrakt: The free swimming ciliated urn found in the coelomic fluid of Phascolosoma agassizii has been studied by electron microscopy. The urn is a multicellular structure composed of three cell types: (a) ciliated cells which possibly function in capturing cell debris and foreign particles; (b) cupola cells which are capable of phagocytozing latex particles; and (c) lobe cells which are capable of phagocytozing carbon particles. The lobes are separated from the ciliated cells by a semilunar area, with mucoprotein staining characteristics, containing fibrils which appear to be the structural support for the urn. Ciliated cells and lobes are attached to the semilunar area by hemidesmosomes. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index