title: Ultrastructure of the contact surfaces of Passalurus ambiguus (Rudolphi, 1819) (Nematoda).
abstract: The ultrastructure of the contact surfaces (integument and intestinal wall) of the nematode Passalurus ambiguus has been studied. The integument is composed according to the scheme common for all nematodes and includes a cuticle, hypodermis and a muscular layer. The specificity is with regard to the epicuticle, the different number of the cuticular sublayers in the anterior, central and the posterior parts of the worm body and the absence of a basal cuticular membrane. The intestinal wall consists of epithelial cells with microvilli. The ultrastructural characteristics of both contact surfaces indicate their main functions--absorption, secretion, transport, protection, movement, etc.
authors.affiliation: Institute of Experimental Pathology and Parasitology, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Bl. 25, 1113 Sofia, Bulgaria. kg30iepp@bas.bg
authors.forename: Katia
authors.initials: K
authors.lastname: Georgieva
authors.forename: Aneta
authors.initials: A
authors.lastname: Yoneva
authors.forename: Yana
authors.initials: Y
authors.lastname: Mizinska-Boevska
authors.forename: I
authors.initials: I
authors.lastname: Todev
mesh_terms: D000818:Animals; D004847:Epithelial Cells / Q000648:ultrastructure; D034582:Integumentary System; D007413:Intestinal Mucosa / Q000166:cytology; D046529:Microscopy, Electron, Transmission; D009348:Nematoda / Q000648:ultrastructure*; D013499:Surface Properties