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The cardiovascular chromaffin cell system of the southern hemisphere lamprey, Geotria australis gray
Author(s) -
Epple A.,
Hilliard R. W.,
Potter I. C.
Publication year - 1985
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1051830210
Subject(s) - biology , lamprey , sinus venosus , anatomy , chromaffin cell , teleostei , zoology , adrenal medulla , catecholamine , neuroscience , fishery , fish <actinopterygii>
This study demonstrates that the silver technique of Grimelius (Acta Soc. Med. Ups. 73 :243–270, 68) is ideally suited for the study of cardiovascular chromaffin cells in lampreys. This method showed that in the Southern Hemisphere lamprey, Geotria australis , the distribution of chromaffin cells differs from that described for holarctic species. In G. australis , the chromaffin cells are found mainly in the sinus venosus, atrium, and nearby regions of the cardinal and jugular veins, and they are absent from the ventricle and conus arteriosus. The location and discreteness of the large accumulation of chromaffin cells in the lateral wall of the right posterior cardinal vein of adults resemble those of the precardiac axillary bodies of elasmobranchs. Chromaffin cells become more abundant during metamorphosis. The possible phylogenetic and functional significance of lamprey chromaffin cells is briefly discussed.