Scanning and light microscope studies of the development of the chick embryo semilunar heart valves

Anatomy and Embryology
J M Hurle

Abstract

The development of the semilunar valves of the great arteries was studied by light and scanning electron microscopy in the chick embryo. The results show that three distinct developmental periods can be distinguished. The formation of the anlage of the valves takes place in the first period (stages 26--29). These early anlage consist of three pyramidal shaped cusps formed by a core of loosely packed mesenchymal cells covered by a flattened endothelium. In the second period (stages 30--35) the cusps undergo excavation on their distal face. Morphololgical evidence is reported suggesting that this excavation process is produced by an initial solid ingrowth of the endothelium of the arterial face of the cusps which is immediately luminated by detachment of cells towards the bloodstream and by cell death. The histogenesis of the valves takes place in the third period (from stage 36 until hatching). It was observed that during this period some myocardial cells of the outflow tracts of the ventricles invade the valvular tissue and that in the upper part of the cusps a prominent fibrous layer is formed.

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Citations

Aug 1, 1994·Developmental Dynamics : an Official Publication of the American Association of Anatomists·J M HurleM Solursh
Jan 1, 1980·Anatomy and Embryology·J M HurleA M Blanco
Jan 1, 1985·Anatomy and Embryology·J M Icardo
Jul 27, 2011·Journal of Cardiovascular Translational Research·Joyce Bischoff, Elena Aikawa
Apr 12, 2008·Cardiovascular Pathology : the Official Journal of the Society for Cardiovascular Pathology·Robert R AttaranMarvin J Slepian
Oct 12, 2001·The Anatomical Record·S R QayyumM K Richardson
May 29, 2003·Birth Defects Research. Part C, Embryo Today : Reviews·Florence RothenbergMichiko Watanabe
Aug 1, 1992·Circulation Research·F de JongA F Moorman
Oct 1, 1982·The Anatomical Record·M A Fernandez-Teran, J M Hurle
Oct 1, 1989·The American Journal of Anatomy·J Gilloteaux, D Linz
Sep 30, 2020·Journal of Cardiovascular Development and Disease·Deborah J HendersonBill Chaudhry
Oct 3, 2018·Current Opinion in Biomedical Engineering·Sridhar SraeyesJonathan T Butcher

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