University of Khartoum

Ultrastructural morphometric observations on the extramural aortico-pulmonary bodies of the domestic fowl

Ultrastructural morphometric observations on the extramural aortico-pulmonary bodies of the domestic fowl

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Title: Ultrastructural morphometric observations on the extramural aortico-pulmonary bodies of the domestic fowl
Author: Abdalla, Mohamed Ahmed
Abstract: The domestic fowl possesses intra- and extramural aortico-pulmonary bodies (Taha & King, 1986). The presence of intramural granular cells in the aorta of the domestic fowl was believed to be restricted to the aortic arch (Kondo, 1974; Ookawara, Suzuki, Yoshida & Ooneda, 1974; Ookawara, 1977). But Taha & King (1986) have shown that both intra- and extramural groups of granular cells are distributed throughout the first part of the aorta and the pulmonary trunk and arteries. These aggregations of cells were called aortico-pulmonary bodies. Taha & King (1986) established that the aortico-pulmonary bodies of the domestic fowl consist mainly of two types of cell, namely the Type I cell which is characterised by dense-cored vesicles and the Type II cell which contains no dense-cored vesicles but always invests the Type I cell. Many axonal endings and fenestrated blood capillaries are closely associated with the Type I cells. The Type I cells show evidence of exocytosis and have the ability to take up precursors of biogenic atnines, On the basis of this evidence, Taha & King have suggested that the aortico-pulhonary bodies of the domestric fowl have chemoreceptor and general secretory functions similar to those of the carotid body. Although the aortic bodies in mammals have rwtly been analysed morphometrically (Hansen, 1979; Ballard, Blackman, PNlaot & AlNeamy, 1982; Hansen, 1984; Kummer & Addicks, 1986), there appear- to hayv been no quantitative data recorded on the aortico-pulmonary bodies of th dintrk fowl. This paper provides ultrastructural morphometric data on these stctUr-I,
URI: http://khartoumspace.uofk.edu/123456789/22601


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