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  • Title: Elastogenesis in the wall of the human thoracic aorta.
    Author: Horká J, Pohunková H.
    Journal: Folia Morphol (Praha); 1990; 38(1):38-43. PubMed ID: 2341079.
    Abstract:
    The results of this study dealing with the human thoracic foetal aorta testify that even in the middle of the fifth month of development the internal elastic membrane is not yet completely continuous. Furthermore they show that elastogenesis in the tunica media of the human thoracic aorta does not begin directly below the internal elastic membrane, as it does in the foetal aorta of the laboratory rat, but, as it can be seen in our material, somewhat deeper in the developing tunica media. A thin layer of less differentiated tunica media cells persists for a long time in the vicinity of the internal elastic membrane. In the middle of the fifth month, the fusing elastic membrane segments in the tunica media still consist of very immature elastic tissue with a large proportion of the microfibrillar component. The collagen fibrils in the intercellular spaces in the whole depth of the wall of the developing aorta do not become a part of the elastic membranes. Their bundles merely accompany all the elastic membranes in the wall of the thoracic aorta, including the internal elastic membrane.
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