Fine structure of the 7 postnatal days Calomys callosus palatine salivary glands.
The aim of this study has been to determine the ultrastructural characteristics of the minor palatine salivary glands on the seventh day of development and to demonstrate wether their secretion is mucous, serous or seromucous by light, transmission and scanning electron microscopy. This study has shown that the palatine gland acinar cells are predominantly mucous with some serous units. These cells contain electron dense (serous) and low electron dense (mucous) granules in the apical portions. The cytoplasmatic organelles like mitochondria, Golgi apparatus and rough endoplasmic reticulum are localized in a supranuclear portion. We could also observe the flattened myoepithelial cells surrounding the basal part of the acini with myofilaments, Golgi apparatus and mitochondria. Desmosomal junctions and membrane interdigitations are present between the acinar and the myoepithelial cells. A basal lamina, divided in two layers, an electron dense and an electron lucent is present between the glandular stroma which is composed of dense connective tissue and the endpieces.
Institute of Biomedical Sciences, Department of Anatomy, University of São Paulo, Av. Prof. Lineu Prestes, 2415, Cidade Universitária, CEP 05508-900, São Paulo, Brazil.
Isabel Cristina
IC
Céspedes
Ii-sei
IS
Watanabe
Marcelo Cavenaghi Pereira
MC
da Silva
Bruno
B
König Júnior
Keith Jimmy
KJ
Gonçalves
Marcia Consentino
MC
Kronka
Ruberval Armando
RA
Lopes
Marisa
M
Semprini
D000818:Animals; D000831:Animals, Newborn; D008854:Microscopy, Electron; D009115:Muridae / Q000033:anatomy & histology*; D010159:Palate / Q000648:ultrastructure*; D012469:Salivary Glands / Q000033:anatomy & histology* / Q000648:ultrastructure