Acta Entomology and Zoology
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P-ISSN: 2708-0013, E-ISSN: 2708-0021

2024, Vol. 5, Issue 1, Part B

Histomorphological development study of the heart ventricles of local Awassi sheep during the first and second half of gestation


Author(s): Ahmed Jamil Abid and Ahlam Jaber Hamza

Abstract: Background and Objective: Study the morphological, histochemical, histomorphometric, and development statements of the heart in different prenatal stages of ages (First and second gestation). Also study of the morphological and histological structure associated with development of the heart in local awasi sheep. Results: At the (70-75) days of gestation fetal heart was a narrow cone-shaped and hollow muscular organ pinkish in colour and located in the mediastinum more towards the left side of the midline in the crania-ventral part of the thoracic cavity in the frontal of the diaphragm at this stage, Histologically: present study the wall of atrium and ventricle composed from three layers (Outer epicardium, middle myocardium, inner endocardium), epicardium layer was formed by the simple squamous epithelium of mesothelium cells and a layer of loose connective tissue with vein and blood vessels and adipose tissue present beneath the surface of the epicardium. The myocardium middle and thick layer is composed of bundles of cardiac myocytes, these cells show eosinophilic cytoplasm with oval nuclei. The endocardium inner layer was made up of a single layer of simple squamous epithelium with central nuclei, subendocardium was composed of collage, elastic fibres blood and lymphatic vessels, and Purkinje fibres at (130-135) days of gestation, the heart triangular was in shape and was placed on the left side and extended from the 2nd to the 5th intercostal space and hollow muscular organ. Histologically: the wall of both atria and ventricles is composed of three layers (Outer epicardium, middle myocardium, inner endocardium), the epicardium is composed single layer mesothelium (Simple squamous epithelium), and the subepicardial (Loose connective tissue, blood, lymphatics vessels and adipose tissue), myocardium composed from more bundles of cardiac cells and Purkinje bundles embedded in loose connective tissue, endocardium was composed of three layers (Endothelium, subendothelium, subendocardium layers) the endothelial layer simple squamous epithelium, subendocardium the deepest layer was composed of collagen fibres and Purkinje fibres these layer connected between of endocardium and myocardium.

DOI: 10.33545/27080013.2024.v5.i1b.136

Pages: 153-158 | Views: 427 | Downloads:

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Acta Entomology and Zoology
How to cite this article:
Ahmed Jamil Abid, Ahlam Jaber Hamza. Histomorphological development study of the heart ventricles of local Awassi sheep during the first and second half of gestation. Acta Entomol Zool 2024;5(1):153-158. DOI: 10.33545/27080013.2024.v5.i1b.136

Acta Entomology and Zoology
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