Fine structural analysis of the epithelial cells in the hepatopancreas of Palaemonetes argentinus (Crustacea, Decapoda, Caridea) in intermoult
Biocell
;
29(1): 25-31, abr. 2005. ilus
Artículo
en Inglés
| LILACS
| ID: lil-429663
ABSTRACT
The aim of this study is to describe the ultrastructure of the hepatopancreas of P argentinus in intermoult. P argentinus hepatopancreas was studied using standard TEM techniques. Each tubule consists of four cellular types E (embryonic), F (fibrillar), R (resorptive) and B (blister like). E-cells have embryonic features and some of them were found in mitosis. F, R and B cells possess an apical brush border. F-cells have a central or basal nucleus, a conspicuous RER, and dilated Golgi cisternae. R cells show a polar organization of organelles in three areas apical, with numerous mitochondria and sER tubules, a central are a with the nucleus and RER, and a basal area containing a sER-like tubule system and mitochondria. B-cells were observed at different stages of their life cycle. In an early differentiation stage they comprise an apical endocytotic complex and Golgi vesicles. The fusion of endocytotic and Golgi vesicles originates subapical vacuoles. During maturation, a big central vacuole is formed by coalescence of subapical vacuoles. The central vacuole is eliminated by holocrine secretion. The ultrastructure suggests that F-cells synthesize proteins, R-cells storage nutrients and B-cells have a secretory or excretory function, and confirms the independent origin of F, B and R cells from the embryonic cells
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Índice:
LILACS (Américas)
Asunto principal:
Mariscos
/
Crustáceos
/
Hepatopáncreas
/
Contaminación Ambiental
/
Células Epiteliales
/
Epitelio
Límite:
Animales
País/Región como asunto:
America del Sur
/
Argentina
Idioma:
Inglés
Revista:
Biocell
Asunto de la revista:
Clulas
Año:
2005
Tipo del documento:
Artículo
País de afiliación:
Argentina
Institución/País de afiliación:
Universidad Nacional de Mar del Plata/AR
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