The fine structure of the hyaloid arteriole in bovine vitreous

• Published in: Experimental eye research Vol. 31; no. 2; pp. 129 - 145
• Main Authors: Bloom, G.D., Balazs, E.A., Ozanics, V.
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.08.1980
• Subjects: Animals; Arterioles - embryology; Arterioles - ultrastructure; Cattle; Cloquet's canal; endothelium; Endothelium - ultrastructure; fibroblast; Gestational Age; hyalocyte; hyaloid arteriole; Microscopy, Electron; multilayered fenestrated sheets; Muscle, Smooth, Vascular - ultrastructure; primitive muscle cell; Vitreous Body - blood supply; endothelium; fibroblast; hyalocyte; primitive muscle cell; multilayered fenestrated sheets; hyaloid arteriole; Cloquet's canal
• ISSN: 0014-4835; 1096-0007
• DOI: 10.1016/0014-4835(80)90074-3

The purpose of this study is the descriptive analysis of the morphology of the bovine fetal and neonatal hyaloid arteriole as seen with the transmission electron microscope. Gross and minute details of intra- and extracellular formations in the wall of this arteriole are noted during its developing and atrophying stages. During the last period of the first trimester and through mid-gestation the endothelial cells and the primitive myocytes have the ultrastructural characteristics of actively seretory cells. It is presumed that they are involved in the synthesis of the elaborate lamellar systems of the extracellular matrix. Observations are made on the appearance and the staining characteristics of the elaborate multi-layered basal lamina-like membranes located between the intima and muscularis and between the several muscle cell layers. The composition and eventual fate of the non-degenerated portion of the hyaloid arteriole is discussed and its relation to the wall of Cloquet's canal is postulated.