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Structure of portal vein heart wall in the brown hagfish ( Paramyxine atami )
Author(s) -
Endo Hideki,
Yamada Tadasu K.,
Kurohmaru Masamichi,
Hayashi Yoshihiro
Publication year - 1997
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/(sici)1097-4687(199703)231:3<225::aid-jmor2>3.0.co;2-a
Subject(s) - hagfish , biology , anatomy , ultrastructure , myofibril , myocyte , medicine , endocrinology , vertebrate , biochemistry , gene
The portal vein heart (PVH) wall of the brown hagfish ( Paramyxine atami ) was observed by light and transmission electron microscopy. Cardiac musculature is well developed in the PVH wall. The myocytes possess arranged myofibrils in the cytoplasm. We suggest that the PVH may act as a pump in blood circulation from the intestines to the liver, as it does in other myxinoid species. Ultrastructural and immunohistochemical findings of the brown hagfish PVH myocytes also indicate that the PVH has an active contraction and atrial natriuretic polypeptide endocrine function. J Morphol 231: 225–230, 1997. © 1997 Wiley‐Liss, Inc.