Ultrastructural observations of the vitelline cells of Metamicrocotyla macracantha (Monogenea, Microcotylidae)
Mem. Inst. Oswaldo Cruz
;
93(4): 543-8, July-Aug. 1998. ilus
Artigo
em Inglês
| LILACS
| ID: lil-213337
ABSTRACT
An electron microscopic study of the vitelline follicles of Metamicrocotyla macracantha (Alexander, 1954) Karatha, 1955 showed that they are composed of cells in different stages of development. The immature cells have a large nucleus, nucleolus, cytoplasm with free ribosomes and few mitochondria. The development vitelline cells present granules which are small in the early stages, increasing with maturity. The mature cells have an extensive granular endoplasmic reticulum and droplets of shell-protein; with maturation, clusters of shell protein and yolk bodies are formed and released in the ciliated vitelline ducts. Vitelline development is continuous and all of the cellular stages involved can be found in each follicle.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Trematódeos
/
Saco Vitelino
/
Células
Limite:
Animais
Idioma:
Inglês
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
Medicina Tropical
/
Parasitologia
Ano de publicação:
1998
Tipo de documento:
Artigo
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