Differentiation of the ventricular myocardium of the heart of Chalcides ocellatus (Reptilia)

The differentiation of the ventricular myocardium of the lizard Chalcides ocellatus was studied at the light and electron microscopes. In the early stages of development (< 50 somites) the ventricular myocardium originates from mesenchyme cells. Later in development (> 50 somites) the myocardi...

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Bibliographic Details
Published in:Bollettino di zoologia 1990-01, Vol.57 (1), p.39-43
Main Author: Farina-Lipari, Elvira
Format: Article
Language:English
Subjects:
Biological and medical sciences
Differentiation
Embryology: invertebrates and vertebrates. Teratology
Fundamental and applied biological sciences. Psychology
Heart
Myocardium
Organogenesis. Fetal development
Organogenesis. Physiological fonctions
Reptilia
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Summary:The differentiation of the ventricular myocardium of the lizard Chalcides ocellatus was studied at the light and electron microscopes. In the early stages of development (< 50 somites) the ventricular myocardium originates from mesenchyme cells. Later in development (> 50 somites) the myocardium presents a compact outer layer and a spongy inner layer. The structure of the sarcomere is similar to that of other vertebrate hearts; granules are present in the cytoplasm, and collagen fibers are found in the subendothelial space. The intercellular junctions are formed by intercalated discs and desmosomes.
ISSN:0373-4137
DOI:10.1080/11250009009355671