PMID: 10853970Jun 15, 2000Paper

Bones in the heart skeleton of the otter (Lutra lutra)

Journal of Anatomy
M EgerbacherS Hauer

Abstract

In most mammalian species the cardiac skeleton is composed of coarse collagen fibres, fibrocartilage, and pieces of hyaline cartilage. Bone, the os cordis, is a regular constituent of the ruminant heart. The cardiac skeleton of the otter (Lutra lutra) has not previously been described. The skeleton in 30 otter hearts was studied by x-ray analysis and light microscopy. Serial sections were cut parallel to the atrioventricular plane and histochemical staining methods were performed to identify connective tissue fibres, glycosaminoglycans, mineral deposits, and bone. Age and sex of the animals under investigation were considered. The otter heart skeleton was composed of coarse collagen fibres with intercalated pieces of fibrous and/or hyaline cartilage, calcified cartilage, and lamellar bone with red or white marrow. Pieces of hyaline cartilage were not clearly defined: a perichondrial layer was missing and coarse connective tissue continuously transformed into fibrous and hyaline cartilage. In both sexes the amount of cartilage and bone were found to increase with age. Our results establish the presence of bony material in the heart skeleton of the otter, a small mammalian species. This finding indicates that differentiation of b...Continue Reading

Citations

May 21, 2005·Journal of Comparative Pathology·V Sans-ComaJ M Arqué
Dec 7, 2007·Environmental Monitoring and Assessment·Robert A Grove, Charles J Henny
Dec 15, 2010·Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft·Tomokazu Kawashima, Hiroshi Sasaki
Oct 20, 2015·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·Robert S StephensonJonathan C Jarvis
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Apr 28, 2020·Biological Reviews of the Cambridge Philosophical Society·Alireza Nasoori
May 7, 2020·American Journal of Physiology. Cell Physiology·Jingjin DaiShiwu Dong
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