Overview

A vascular system consists of a supplying arterial and a draining venous part which are connected by a terminal vascular network. The arterial segment can be characterized according to the structural features of the vessel wall. However, it is sometimes diffi- cult to distinguish the capillary from the postcapillary vessels on the basis of structural features alone. On the other hand, physiologic qualities such as permeability can hard- ly be associated with an equivalent histologic pattern of the vessel wall (lllig 1961; Rhodin 1967, 1968; Hauck 1971; Westergaard 1974). A defmition of a vascular seg- ment based on biologic significance should combine morphological and functional qualities of the vessel walls. During the ontogeny of the mammalian organism a variety of vascular patterns (e. g. , distribution of arteries and veins, arrangement of the capillaries) has been formed typical of each organ (Wolff et al. 1975; Baez 1977). The capillaries connect the feed- ing arterioles and the collecting venules in two different ways according to the branch- ing pattern of the terminal vessels (Hauck 1975, Wolff et al. , 1975). The arterioles and venules are directly connected by capillary segments. Consequently a terminal vessel called arteriovenous (a-v) capillary results, or a closely meshed capillary network is de- veloped which connects arterioles and venules by a variable number of small capillary branches arranged parallel to the preexisting a-v capillary.

Full Product Details

Author:   Thomas Bär
Publisher:   Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
Imprint:   Springer-Verlag Berlin and Heidelberg GmbH & Co. K
Edition:   Softcover reprint of the original 1st ed. 1980
Volume:   59
Dimensions:   Width: 17.00cm , Height: 0.40cm , Length: 24.40cm
Weight:   0.151kg
ISBN:  

9783540096528

ISBN 10:   3540096523
Pages:   62
Publication Date:   01 January 1980
Audience:   Professional and scholarly ,  Professional & Vocational
Format:   Paperback
Publisher's Status:   Active
Availability:   Out of stock  
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Table of Contents

1 Introduction.- 2 Material and Methods.- 3 Results.- 3.1 Extracerebral (Leptomeningeal) Vascularization.- 3.2 Intracerebral Vascularization.- 3.3 Morphometric Evaluation of Capillaries in Different Layers of the Cerebral Cortex by Automatic Image Analysis.- 3.4 Thickness of Cerebral Cortex During Postnatal Development.- 3.5 Morphometric Evaluation of Capillaries in Different Layers of the Cerebral Cortex by Automatic Image Analysis: Changes During Aging.- 3.6 Effects of Oxygen Deficiency on Intracortical Microvessels.- 4 Discussion.- 4.1 Methodological Considerations.- 4.2 First Stage of Intracortical Vascularization and Architecture of Intracortical Vascular Trunks.- 4.3 Second Stage of Intracortical Vascularization.- 4.4 Third Stage of Intracortical Capillarization.- 4.5 Vascular Sprouting.- 4.6 Effects of Hypoxia Upon Postnatal Capillarization.- 4.7 Intracortical Capillaries During Aging.- 5 Summary.- References.

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