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Size Relations of Lymphomyeloid Organs in Some Cartilaginous Fish
Author(s) -
Fänge Ragnar
Publication year - 1977
Publication title -
acta zoologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.414
H-Index - 37
eISSN - 1463-6395
pISSN - 0001-7272
DOI - 10.1111/j.1463-6395.1977.tb00246.x
Subject(s) - biology , chimera (genetics) , anatomy , zoology , gene , genetics
In elasmobranchs (sharks, rays) the total weight of lymphomyeloid structures isolated by dissection varied between about 0.6 and 1.0% of the body weight. In a holocephalan ( Chimaera ) the corresponding value was 1.7%. Reciprocal size relations may exist between different types of lymphomyeloid organs. A thymus was found in adult specimens of rays ( Raja ) and the rabbit‐fish ( Chimaera ). The lymphomyeloid organs supposedly are active in haemopoiesis and the immune responses.