title: Ultrastructural study of mesenteric lymph nodes in old rats.
abstract: The large mononuclear cells showed the features of mononuclear phagocytes and were mainly characterised by a large number of vacuolar structures. The results suggest that there is storage of lipids and mucosubstances, probably in enlarged lysosomes.
mesh_terms: D000375:Aging; D000818:Animals; D008198:Lymph Nodes / Q000648:ultrastructure*; D008643:Mesentery; D010586:Phagocytes / Q000648:ultrastructure; D051381:Rats / Q000033:anatomy & histology*