title: Morphological aspects and observations about the permeability of the rat mesentery to the lanthanium Nitrate. Some comparisons with the morphology of the human mesentery.
abstract: A review in the classic literature showed that many authors were interested about the permeability and structure of the mesentery. With the evolution of new techniques, this subject came back in different research areas. The purpose of this paper concentrates in the study of the permeability of the mesentery and of other small intestine layers of the rat to the lanthanium nitrate. Some comparisons are also made with the morphology of the human mesentery. Human and rat mesentery were used in different methods, and an ultrastructural study was performed. However, in all techniques employed in our paper, we could not observe a single area of the basement membrane that was penetrated by the lanthanium nitrate. We may conclude that the penetration of the lanthanium nitrate is impeded by the basement membrane and that this penetration is also impeded in the intercellular space of the mesothelial layer by the presence of a basal lamina, which is continuous with the basement membrane, as we can see in some of our sections.
mesh_terms: D000818:Animals; D001485:Basement Membrane / Q000378:metabolism; D006801:Humans; D007811:Lanthanum; D008643:Mesentery / Q000378:metabolism / Q000648:ultrastructure*; D008854:Microscopy, Electron; D010539:Permeability; D051381:Rats
chemical_list: C016534:lanthanide nitrate; D007811:Lanthanum