Summary
Embryonic chick hearts stages 15 to 21 according to the Hamburger-Hamilton series (1951) were subjected to TEM and light-microscopical examination to investigate ventricular mural endocardium during early trabeculation. Serial sectioning of consecutively-aged embryos indicated an invagination of the endocardial layer which lines the intertrabecular and intermuscular spaces. During the proceeding development, frequently occurring approaches and contacts between mural endocardium and myocardium could be observed. At all stages examined, the cardiac jelly appeared as an acellular, at particular sites very attenuated matrix. The intercellular gaps of the endocardium could not be correlated to the invagination and the endothelialization of the intertrabecular spaces.
Similar content being viewed by others
References
Bolender DL, Markwald RR (1979) Epithelial-mesenchymal transformation in chick atrioventricular cushion morphogenesis. Scanning Electron Microsc 3:313–321
Fitzharris TP (1981a) Origin and migration of cushion tissue in the developing heart. Scanning Electron Microsc II:255–260, 254
Fitzharris TP (1981 b) Endocardial shape change in the truncus during cushion tissue formation. In: Pexieder T (ed) Mechanisms of cardiac morphogenesis and teratogenesis, Raven Press, New York, pp 227–235
Hamburger, B, Hamilton HL (1951) A series of normal stages in the development of the chick embryo. J Morphol 88:49–91
Icardo JM, Ojeda JL, Hurle JM (1982) Endocardial cell polarity during the looping of the heart in the chick embryo. Dev Biol 90:203–209
Johnson RC (1976) A scanning electron microscopic study of the developing chick mural endocardium. Anat Rec 184:438
Los JA, Langemeijer van Eijndthoven E (1978) The fusion of the atrioventricular endocardial cushions in the heart of the chick and the mouse embryo. Acta Morphol Neerl Scand 16:138–139
Manasek FJ (1970) Histogenesis fo the embryonic myocardium. Am J Cardiol 25:149–167
Markwald RR, Fitzharris TP, Adams-Smith WN (1975) Structural analysis of endocardial cytodifferentiation. Dev Biol 42:160–180
Markwald RR, Fitzharris TP, Manasek F (1977) Structural development of endocardial cushions. Am J Anat 148:85–121
Markwald RR, Fitzharris TP, Bank H, Bernanke DH (1978) Structural analysis of the matrical organization of glycosaminoglycans in developing endocardial cushions. Dev Biol 62:292–316
Patten BM, Kramer RC, Barry A (1948) Valvular action in the embryonic chick heart by localized apposition of endocardial masses. Anat Rec 102:299–311
Pexieder T (1981) Prenatal development of the endocardium: A Review. Scanning Electron Microsc II:223–253
Spira AW (1971) Cell junctions and their role in transmural diffusion in the embryonic chick heart. Z Zellforsch 120:463–487
Steding G, Seidl W (1980) Contribution to the development of the heart. Part I: Normal development. Thorac Cardiovasc Surg 28:386–409
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Schünemann, K. Intercellular gaps in the early development of chick mural endocardium. Anat Embryol 175, 375–378 (1987). https://doi.org/10.1007/BF00309850
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00309850