scholarly journals Vascular architecture of the carotid labyrinth in larval and adult Xenopus laevis – Histomorphology and scanning electron microscopy of vascular corrosion casts

2017 ◽  
Vol 77 (1) ◽  
pp. 1-11
Author(s):  
C Deutschmann ◽  
B Minnich ◽  
A Lametschwandtner
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Xenopus Laevis ◽  
Vascular Architecture ◽  
Carotid Labyrinth ◽  
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.

Vascular and microvascular anatomy of the gill of the southern rock lobster, Jasus novaehollandiae Holthius

1982 ◽  
Vol 33 (6) ◽  
pp. 1017 ◽  
Author(s):  
PAW Rogers
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Gill Filament ◽  
Rock Lobster ◽  
Vascular Architecture ◽  
Vascular Casting ◽  
Counter Current ◽  
Longitudinal Septum ◽  
Scanning Electron

The vascular architecture of the gill of J. novaehollandiae was studied by light microscopy, scanning electron microscopy and vascular casting. Before fixation or infusion of the vascular casting medium, haemolymph was flushed from the lobster using 3.5% saline infused into the dorsal aorta. J. novaehollandiae has a complex gill circulation, with three types of gill filament present. The fewer, but larger, inner filaments have a longitudinal septum, from 3 to 8 pm thick, dividing them into afferent and efferent channels. By contrast, the septum in the outer filaments is 11-22�m thick. Middle filaments, found between the inner and outer ones, have two septa dividing them into three channels. The gill axis has four major vessels: an afferent vessel supplying the outer and middle filaments, two lateral canals draining the outer filaments, connecting to the middle filaments and supplying the inner filaments on each side of the gill, and an efferent vessel draining the middle and inner filaments. Thus, most of the haemolymph passes through both outer and inner filaments on its route through the gill. Movement of haemolymph from one channel to another within each filament is via a number of lateral lacunae around the sides of the filament. It is postulated that the relatively thick septum of the outer filament acts as a barner to counter-current loss of oxygen from the efferent to the afferent channels of the filament, whereas the thinner septum of the inner filament may not function in this capacity.

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

Sign in / Sign up

Export Citation Format

Share Document