Reference Entry

cardiac muscle

Edited by Elizabeth Martin and Robert Hine

in A Dictionary of Biology

Seventh edition

Published in print June 2016 | ISBN: 9780198714378
Published online September 2015 | e-ISBN: 9780191782770
cardiac muscle

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A specialized form of *muscle that is peculiar to the vertebrate heart. Each cardiac muscle fibre is an individual small cell, tapering at either end and containing a single nucleus. The cells branch and interdigitate in a meshlike arrangement, and adjacent cells are joined by intercalated discs and gap junctions to provide extra adhesion and strength to resist the powerful forces of muscular contractions. There are two types of cardiac muscle cells: contractile cells, which are striated and contain numerous myofibrils; and conducting cells, or ...

Reference Entry.  140 words. 

Subjects: Biological Sciences

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