| 释义 |
paraganglion Anat.|pærəˈgæŋglɪən|
Pl. -ia.
[a. G. paraganglion (A. Kohn 1900, in Arch. f. mikrosk. Anat. LVI. 130): see para-1 and ganglion.]
Any of several highly vascular groups of chromaffin cells that are similar to those of the adrenal medulla and in position and development are closely associated with the sympathetic nerve trunks; also applied to some structures now recognized as non-chromaffin (see quots. 1940, 1962).
1907Med. Rec. (N.Y.) 3 Aug. 188/2 These occur in the medullary substance of the adrenal bodies, in the so-called paraganglia of the same organs. 1930Maksimov & Bloom Textbk. Histol. xxxiv. 709 These paraganglia include the carotid gland and widespread, rather small accumulations of cells in the retroperitoneum which are often spoken of as the organs of Zuckerkandl. 1937Contrib. Embryol. XXVI. 17 A study of the development of the carotid body..has left me unconvinced that it can be regarded as a paraganglion in the strict sense of the term. A priori..the term paraganglion means a structure of which the essential cells are derived in their entirety from the nervous system. 1940Q. Rev. Biol. XV. 167/2 Recently..a distinction has been made between chromaffin and non-chromaffin paraganglia. 1962E. C. Crosby et al. Correl. Anat. Nerv. Syst. viii. 545/1 Small collections of cells found in relation with certain blood vessels constitute the carotid body, the aortic bodies, the jugular body..and the coccygeal body... Although sometimes referred to as paraganglia, as the term is used in its wider sense, these cell masses usually contain no chromaffin cells and are unlike the chromaffin bodies in other ways as well. 1965Lee & Knowles Animal Hormones iv. 85 In mammals additional chromaffin tissue may be found in the lower part of the abdominal aorta (para-aortic glands), or in contact with sympathetic ganglia (paraganglia).
Hence ˌparagangliˈonic a.
1937Contrib. Embryol. XXVI. 27 (caption) Reconstruction of the branchial-arch arteries in a 26-mm. human embryo to show positions in which ‘paraganglionic’ tissue can be found. 1959W. Andrew Textbk. Compar. Histol. xiii. 530 No true carotid body is present in fishes, amphibians, and reptiles. It is only in birds and mammals that the paraganglionic cells in this region form an organ. |