Abstract
THE relatively large amounts of catecholamines found in the hearts of cyclostomes1,2 suggest that these substances may be stored in specific cells or cellular structures. Preliminary examination with the light microscope of specimens from the hearts of the lamprey (Petromyzon fluviatilis) and the hagfish (Myxine glutinosa) indicated the presence of a specific cell type possibly serving as store. It was therefore considered of interest to analyse different cardiac structures of these two cyclostomes with regard to their content of catecholamines and to make a parallel study of the morphology of this unknown cell with the aid of the electron microscope.
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ÖSTLUND, E., BLOOM, G., ADAMS-RAY, J. et al. Storage and Release of Catecholamines, and the Occurrence of a Specific Submicroscopic Granulation in Hearts of Cyclostomes. Nature 188, 324–325 (1960). https://doi.org/10.1038/188324a0
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DOI: https://doi.org/10.1038/188324a0
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