Immature vitelline cells are irregularly- shaped and each contains a large nucleus which occupies almost all the volume m a single nucleolus and dense area of heterochromatin. Ultrastructure of the vitelline follicles of gor- goderina vitelliloba (trematoda: gorgoderidae) international journal for parasitology 9: 47-53 an electron microscope study of the vitelline follicles of gorgoderina vitelliloba indicates that they contain vitelline cells in various stages of development.
Ultrastructure of vitelline cells of experimentally recovered migrating fasciola gigantica medhat ali, hanan el baz, ahmed nigm and marwa aboueldahab abstract the ultrastructure of migrating juvenile fasciola gigantica shows that vitelline cells are grouped in vitelline follicles vitelline cells developed through a series of developmental stages.
An electron microscope study of the vitelline follicles of gorgoderina vitelliloba indicates that they contain vitelline cells in various stages of development juvenile cells are small and. Paradoxus are composed of one type of vitelline cell at different stages of development these occur without the presence of any interstitial cells these vitelline cells (vitellocytes) are irregular, often deeply indented in outline and situated close together (fig 1. Ultrastructure of the vitellarium of ancyrocephalus paradoxus (monogenea: monopisthocotylea), with comments on the nature of the vitellarium in the monogenea and related platyhelminth groups this stage of vitelline cell development is characterized by the appearance of golgi complexes in the cytoplasm,.
Synthesized in the egg it self, but also, in specialized cells the ultrastructure of vitelline cells development in a (a) (a) called vitellines  and these cells are grouped in vitelline aswaninesis, an intestinal parasite of bagrus bayad and. The vitelline cells of some neoophoran platyhelminths shows that the internal structures of the shell forming globules can be grouped into two (or three) main types in the first, globule content is charac.
Ultrastructure is all the structures of a biological specimen that are at least 01nm in their smallest dimension • light microscopes allow us to see the structure of cells • electron microscopes allow us to see the ultrastructure of cells, such as these pancreatic exocrine cells • electron microscopes can see viruses (01μm diameter. The vitelline cells increase in size and in the quan-tity of membrane-bounded protein globules that form clusters (figs 5, 6) in the mature cells, the amount of heterochromatin decreases in the metamicrocotyla macracantha fig 1: transverse section of vitelline follicles showing the various stages of vitelline cell develop-ment x 20. The vitelline cells were the greatest in number and nerve cells were the least in number among them similarly, there were germ cells, sustentacular cells, flame cells, nerve cells, mast cells, muscle cells, multinucleate subtegumental cells, interstitial cells and penetration gland cells in the cultures from the schistomomula.
Composition and ultrastructure of the vitelline gland and the ultrastructure of the tegument and gastrodermis b leitch and a j probert school of biological sciences, university college, bangor, gwynedd, uk the vitelline cells, tegument and gastrodermis were observed by comparison with untreat-ed control worms. Helpful information to develop understanding and notes for 12 ultrastructure of cells.