Journal ArticleDOI
Ultrastructure of the pineal gland in the adult dog.
TLDR
The adult dog pineal gland was studied with the electron microscope and two cell types, pinealocytes and astrocytes, could be identified in pineal parenchyma.Abstract:
The adult dog pineal gland was studied with the electron microscope. Pineal connective tissue spaces were poorly developed and showed capillaries with nonfenestrated endothelial cells. Two cell types, pinealocytes and astrocytes, could be identified in pineal parenchyma. Dog pinealocytes showed microtubules, centrioles, occasional cilia, and well-developed Golgi complexes. These cells showed thin processes with bulbous endings packed with vesicles. Astrocytes were characterized by the presence of numerous filaments. Their processes finished forming a glial layer bordering connective tissue spaces. The presence of myelinated and unmyelinated nerve fibers was also described.read more
Citations
More filters
Journal Article
Structure and ultrastructure of the pigmented cells in the adult dog pineal gland.
TL;DR: The light and electron microscopic features of pigmented cells in the adult dog pineal gland have been described and the pineal pigment has been identified as melanin according to its morphological features and histochemical properties.
Journal ArticleDOI
Structure of the ovine pineal gland during prenatal development
TL;DR: The structure of the ovine pineal gland during prenatal development is studied in women and in men through the course of pregnancy and during the first trimester of pregnancy.
Journal ArticleDOI
Postnatal development of the dog pineal gland: electron microscopy.
TL;DR: The ultrastructure of the dog pineal gland from the first postnatal day to the seventh month is described, which shows immature proliferative cells with abundant cytoplasmic glycogen are still found in the pineal glands of 1 mo‐old dogs.
Journal ArticleDOI
Prenatal development of the sheep pineal gland: An ultrastructural study
TL;DR: The pineal gland of developing sheep embryos showed considerable innervation and abundant vascularization; this, together with certain ultrastructural characteristics, suggests that the gland has a secretory function in uterine life.
Journal Article
The pinealocytes of the human pineal gland: a light and electron microscopic study
TL;DR: The pinealocytes of the pineal gland of children and adults were studied at both light and electron microscopic levels and a very small cell type with an extremely thin and elongated cell body and nucleus was found.
References
More filters
Book ChapterDOI
The epiphyseal cell: an electron-microscopic study of its intercellular relationships and intracellular morphology in the pineal body of the albino rat.
TL;DR: This chapter presents an electron-microscopic study of the epiphyseal cell and its histological disposition with an emphasis on the morphological evidence of secretion.
Journal ArticleDOI
Immunohistochemical demonstration of S-100 protein and GFA protein in interstitial cells of rat pineal gland.
TL;DR: The presence of the glial marker proteins, the S-100 and theglial fibrillary acidic (GFA) protein, in the pineal gland was investigated in the rat and indicates that the interstitial cells are of neuroectodermal origin, possibly macroglial cells themselves.
Journal ArticleDOI
Morphologic evidence of photoreceptor differentiation of pinealocytes in the neonatal rat.
Brian L. Zimmerman,Mark O.M. Tso +1 more
TL;DR: It is suggested that the pinealocytes of the neonatal rat undergo "photoreceptor-like" differentiation during a transient neonatal period, which may provide an explanation for light-induced biochemical changes described in neonatal rats whose eyes had been enucleated.
Book ChapterDOI
Secretory processes in the mammalian pinealocyte under natural and experimental conditions.
TL;DR: In the light of the different concepts treated, the confused state of comprehension of pineal functions becomes more understandable and most of the paradoxical and contradictory facts related to pineal function become less confusing.