Microvascular anatomy and histomorphology of extrapulmonary bronchi in adult Xenopus laevis Daudin (Lissamphibia; Anura) point to a role in aerial gas exchange - histomorphology of tissue sections and scanning electron microscopy of vascular corrosion cas

2013 ◽  
Vol 95 (3) ◽  
pp. 290-298
Author(s):  
Wasan Tangphokhanon ◽  
Alois Lametschwandtner
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Gas Exchange ◽  
Xenopus Laevis ◽  
Tissue Sections ◽  
Scanning Electron

A different type of amphibian mesoderm morphogenesis in Ceratophrys ornata

Development ◽  
1993 ◽  
Vol 117 (1) ◽  
pp. 307-317 ◽  
Author(s):  
S.M. Purcell ◽  
R. Keller
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Layer ◽  
Xenopus Laevis ◽  
Dorsal Surface ◽  
Time Lapse ◽  
Surface Epithelium ◽  
Histological Sections ◽  
Fourth Zone ◽  
Scanning Electron

Ceratophrys ornata, the Argentinean horned frog, has a significantly different pattern of early morphogenesis than does the most studied amphibian, Xenopus laevis. Time-lapse videomicroscopy, scanning electron microscopy, histological sections and lineage tracers have shown that, in C. ornata, some prospective notochord, somite and tailbud mesoderm cells leave the surface epithelium of the archenteron by ingression. After gastrulation, SEM reveals cells with constricted apices and a bottle shape in three zones on the archenteron roof and in a fourth zone around the blastopore. Prospective somitic tissue ingresses first from two lateral zones, followed by ingression of prospective notochord from the medial zone and tailbud mesoderm from the circumblastoporal zone. This is unlike X. laevis, in which no cells with constricted apices are present on the dorsal surface of the archenteron, nor do any cells ingress into the deep mesodermal layers from the surface layer.

scholarly journals Microvascular Anatomy of Extrahepatic Bile Ducts in Adult South African Clawed Toad, Xenopus laevis Daudin: Scanning Electron Microscopy of Vascular Corrosion Casts and Correlative Light Microscopy

2009 ◽  
Vol 15 (S2) ◽  
pp. 986-987
Author(s):  
A Lametschwandtner ◽  
U Lametschwandtner ◽  
H Bartel ◽  
C Radner ◽  
B Minnich
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Xenopus Laevis ◽  
Light Microscopy ◽  
South African ◽  
Bile Ducts ◽  
Corrosion Casts ◽  
Extrahepatic Bile Ducts ◽  
Scanning Electron ◽  
Vascular Corrosion Casts

Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 – July 30, 2009

scholarly journals Integumentary Histology of the Amphibious Blenny, Isteblennius edentulus (Forester and Schneider, 1801)

2009 ◽  
Vol 14 ◽  
pp. 9
Author(s):  
Taher Ba-Omar ◽  
Maisoon M. Al-Riyami
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Gas Exchange ◽  
Epithelial Cells ◽  
Surface Area ◽  
Ventral Side ◽  
Dorsal Side ◽  
Scanning Electron

The skin of the amphibious blenny, Istiblennius edentulus, was studied using both light and scanning electron microscopy. Rich vascularisation was found immediately below the epidermis and the dermis. Surface epithelial cells displayed microridges in a fingerprint-like pattern.  It was speculated that this increased surface area may aid in the adhesion of mucous secretions as well as to increase the surface area for gas exchange. The number of pores on the dorsal side (6.3x103 per mm2) was significantly higher than that on the ventral side (4.3x103 per mm2). The thickness of the skin on the dorsal side was measured at 31.6±10.0µm and that on the ventral side was 32.9 ± 7.8µm.  

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