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
Article
in English
| 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
Search on Google
Index:
LILACS (Americas)
Main subject:
Shellfish
/
Crustacea
/
Hepatopancreas
/
Environmental Pollution
/
Epithelial Cells
/
Epithelium
Limits:
Animals
Country/Region as subject:
South America
/
Argentina
Language:
English
Journal:
Biocell
Journal subject:
Clulas
Year:
2005
Type:
Article
Affiliation country:
Argentina
Institution/Affiliation country:
Universidad Nacional de Mar del Plata/AR
Similar
MEDLINE
...
LILACS
LIS