Degradation in muscle fibre-connective tissue junctions in the spotted trevalla (seriolella punctata) examined by scanning electron microscopy

1986 ◽  
Vol 37 (10) ◽  
pp. 1011-1018 ◽  
Author(s):  
H. Allan Bremner ◽  
Ian C. Hallett
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Connective Tissue ◽  
Muscle Fibre ◽  
Scanning Electron

Light and Scanning Electron Microscopy of Human Spinal Ligaments

1985 ◽  
Vol 55 ◽  
Author(s):  
L.-H. Yahia ◽  
G. Drouin ◽  
C.-H. Rivard
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Connective Tissue ◽  
Idiopathic Scoliosis ◽  
Blood Vessels ◽  
Structural Changes ◽  
Loose Connective Tissue ◽  
Morphological Studies ◽  
Spinal Ligaments ◽  
Scanning Electron

ABSTRACTSpinal ligaments were obtained from normal and scoliotic individuals. Detailed morphological studies were carried out on the yellow, interspinous and supraspinous ligaments by light and scanning electron microscopy. Normal yellow ligaments are mostly constituted of dense elastin fibers with only a few collagen fibers and sparse blood vessels, while in normal interspinous and supraspinous ligaments, the presence of collagen is highly dominant. In the latter structures, the collagen fascicles are characterized by a regular waviness morphology. The fibrils constituting the fascicles appear either parallel or helical with respect to the fascicle axis. Structural changes are observed in the spinal ligaments of patients with congenital as well as idiopathic scoliosis. For yellow ligaments, only slight differences are found between normal and scoliotic specimens. However, alterations in collagen waviness and architecture are observed mainly in the supraspinous ligaments and to a lesser extent in the interspinous ligaments. In addition, increases in the cellularity, loose connective tissue and vessels are found in both forgoing ligaments. These results indicate that the more pronounced scoliosis-related changes occur in ligaments having the farthest distance from the axis of flexion-rotation.

scholarly journals General morphology of the oral cavity of the Nile crocodile, Crocodylus niloticus (Laurenti, 1768). I. Palate and gingivae

2003 ◽  
Vol 70 (4) ◽  
Author(s):  
J.F. Putterill ◽  
J.T. Soley
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Connective Tissue ◽  
Taste Receptors ◽  
General Morphology ◽  
Histological Features ◽  
Microscopic Features ◽  
Sensory Structures ◽  
Nile Crocodile ◽  
Scanning Electron

The heads of nine 2.5 to 3-year-old Nile crocodiles (Crocodylus niloticus) were obtained from a commercial farm where crocodiles are raised for their skins and meat. The animals from which these specimens originated were clinically healthy at the time they were slaughtered. A detailed description of the macroscopic and microscopic features of the palate and gingivae of the Nile crocodile is presented and the results are compared with published information on this species and other Crocodylia. The histological features are supplemented by information supplied by scanning electron microscopy. Macroscopic features of interest are the small conical process situated at the base of the first two incisors of the maxilla, the distribution of cobbled units on the palate, and the broad dentary shelf forming the rostral aspect of the mandible. Histologically the palate and gingivae did not differ significantly from each other and both regions showed a presence of Pacinian-type corpuscles. Two types of sensory structures (taste receptors and pressure receptors) were identified in the regions examined, both involving modification of the epithelium and the underlying connective tissue.

scholarly journals Placentation in the Amazonian manatee (Trichechus inunguis)

2008 ◽  
Vol 20 (4) ◽  
pp. 537 ◽  
Author(s):  
A. M. Carter ◽  
M. A. Miglino ◽  
C. E. Ambrosio ◽  
T. C. Santos ◽  
F. C. W. Rosas ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Connective Tissue ◽  
Light Microscopy ◽  
Phylogenetic Relationship ◽  
Gross Anatomy ◽  
Fetal Membranes ◽  
Close Phylogenetic Relationship ◽  
Chorionic Plate ◽  
Scanning Electron

Evidence from several sources supports a close phylogenetic relationship between elephants and sirenians. To explore whether this was reflected in similar placentation, we examined eight delivered placentae from the Amazonian manatee using light microscopy and immunohistochemistry. In addition, the fetal placental circulation was described by scanning electron microscopy of vessel casts. The manatee placenta was zonary and endotheliochorial, like that of the elephant. The interhaemal barrier comprised maternal endothelium, cytotrophoblasts and fetal endothelium. We found columnar trophoblast beneath the chorionic plate and lining lacunae in this region, but there was no trace in the term placenta of haemophagous activity. The gross anatomy of the cord and fetal membranes was consistent with previous descriptions and included a four-chambered allantoic sac, as also found in the elephant and other afrotherians. Connective tissue septae descended from the chorionic plate and carried blood vessels to the labyrinth, where they gave rise to a dense capillary network. This appeared to drain into shorter vessels near the chorionic plate. The maternal vasculature could not be examined in the same detail, but maternal capillaries ran rather straight and roughly parallel to the fetal ones. Overall, there is a close resemblance in placentation between the manatee and the elephant.

Fine structure of dendritic cells in the epithelial cell layer of the ox tongue

1990 ◽  
Vol 48 (3) ◽  
pp. 528-529
Author(s):  
Kan Kobayashi
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Dendritic Cells ◽  
Epithelial Cell ◽  
Connective Tissue ◽  
Cell Layer ◽  
Transmission Electron ◽  
Epithelial Cell Layer ◽  
Scanning Electron

It is known that some kinds of dendritic cells are distributed in the epithelial cell layer of mucous membrane consisting of stratified squamous epithelium. In the process of exfoliation of the epithelial layer from the underlying connective tissue, dendritic cell bodies exposed on the ruptured surface of the epithelium were detected by scanning electron microscopy. These cells were also observed by light microscopy as well as by transmission electron microscopy.Dorsal mucous membrane of the ox tongue was fixed in Karnovsky's fixative or in 10% formalin. For scanning electron microscopy samples were immersed in 3N-HCl solution for 2-3 weeks at room temperature. The epithelial cell layer was removed from the underlying connective tissue layer1). They were postfixed in tannic acid and then 1% OsO4 for 1 hr. After dehydration in an ethanol series, the specimens were dried by passing through t-butylalcohol, coated with platinum-palladium and observed under an S-800 scanning electron microscope. For transmission electron microscopy, small pieces of the fixed tissue were post-fixed in 1% OsO4 for 1.5 hr and then embedded in Araldite-Epon.

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