Scanning Electron Microscopic Identification of Motor and Sensory Endings on Teased Intrafusal Muscle Fibers

1988 ◽  
pp. 237-240 ◽  
Author(s):  
J. M. Schröder ◽  
H. Bodden ◽  
A. Hamacher ◽  
C. Verres
Keyword(s):  
Muscle Fibers ◽  
Electron Microscopic ◽  
Intrafusal Muscle ◽  
Microscopic Identification ◽  
Scanning Electron Microscopic ◽  
Intrafusal Muscle Fibers ◽  
Electron Microscopic Identification ◽  
Scanning Electron ◽  
Sensory Endings

scholarly journals Prevalence and Scanning Electron Microscopic Identification of Anoplocephalid Cestodes among Small Ruminants in Senegal

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Mallé Ndom ◽  
Gora Diop ◽  
Yann Quilichini ◽  
Tetsuya Yanagida ◽  
Cheikh Tidiane Ba ◽  
...  
Keyword(s):  
Small Ruminants ◽  
Single Species ◽  
Electron Microscopic ◽  
Sheep And Goats ◽  
Microscopic Identification ◽  
Scanning Electron Microscopic ◽  
Moniezia Expansa ◽  
Electron Microscopic Identification ◽  
Scanning Electron ◽  
Dry And Rainy Seasons

This study was undertaken to determine the prevalence of anoplocephalid cestodes in sheep and goats in Senegal. Intestines of 462 sheep and 48 goats were examined; 47.4% of sheep and 6.2% of goats were infected. The species identified and their prevalence were, among sheep,Avitellina centripunctata38.7%,Moniezia expansa15.4%,Stilesia globipunctata16.7%, andThysaniezia ovilla0.4%. Among goats, they wereM. expansa6.2% andT. ovilla2.1%. The prevalence of all species was not statistically different between dry and rainy seasons. The infections were single or multiple. Indeed, 56.2% of sheep were infected by a single species, 37.4% by two species, and 6.4% by three species. For goats, 66.7% were infected byM. expansaand 33.3% by bothM. expansaandT. ovilla. Scanning electron microscopic (SEM) observations of tapeworms show the general diagnosis characters of these species.

Scanning Electron Microscopic Studies on the Ventricular Architecture of Pre-natal Non-descript Sheep

2021 ◽  
Author(s):  
S.K. Sahu ◽  
U.K. Mishra ◽  
S. Sathapathy
Keyword(s):  
Endothelial Cells ◽  
Muscle Fibers ◽  
Papillary Muscles ◽  
Prenatal Period ◽  
Age Group ◽  
Electron Microscopic ◽  
Vital Functions ◽  
Endothelial Surface ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

Background: Heart is the principal organ of circulatory system that pumps blood into the blood vessels and performs many vital functions. Studies on its development before birth of utmost important to safeguard the animal from the occurrence and consequences of various developmental anomalies. The ultrastructural details of ventricular architecture of heart especially in pre-natal sheep has not yet been reported. Methods: The collected foeti of sheep were divided into three age groups viz. early prenatal (up to 50 days), mid prenatal (51-100 days) and late prenatal (101 to 150 days). The samples from ventricles were processed for scanning electron microscopic study and subsequently, the samples were viewed and the photographs were taken in the facility available at Central Instrumentation Facility (CIF), OUAT, Bhubaneswar. The measurements of various parameters of ventricles were also taken at the ultrastructural level. The recorded data were subjected to routine statistical analysis. Result: It was observed that the endocardium of the ventricles consisted of a simple squamous epithelium. The endothelial cells were elongated in shape and arranged linearly on the surface of ventricles in 33 days prenatal non-descript sheep. The boundaries among the endothelial cells were indistinct in this age group. There was presence of pores among the endothelial cells on the surface of the ventricles. In late prenatal period, the endothelial cells of the ventricles became elongated in shape. The subendocardial layer consisted of connective tissue fibers and conducting purkinje fibers, which were quite predominant in the late prenatal period, i.e. at the age of 120 days of gestation. The endocardial fibers were distinctly coiled around the endothelial cells of the ventricles in this age group. The myocardium comprised of cylindrical and highly branched cardiac muscle fibers with pores all over the surface of the myocardium of the ventricles. Each muscle bundle in the myocardium consisted of muscle fibers extending parallel to each other longitudinally and that these fibers made collateral connections with each other in some regions. The papillary muscles were ridge like structures projecting into the lumen of the ventricles of heart. The chordae tendinae connected the papillary muscles and the bicuspid and tricuspid valves. The endothelial surface of the chordae tendinae consisted of elongated endothelial cells with pores among them. The pores of various sizes were arranged linearly in patches on the endothelial surface of the chordae tendinae of the ventricles especially in the late prenatal period, i.e. at about 105 days of gestation.

Sign in / Sign up

Export Citation Format

Share Document