File:Cardiac muscle EM03.jpg

From Embryology

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Cardiac Muscle Electron Micrograph

Electron micrograph of parts of of portions of four cat cardiac muscle fibers and a capillary (Cap) in transverse section. This is a historic (1969) EM showing key features in cardiac muscle ultrastructure. Myofilaments (Mfl) are not grouped in discrete myofibrils, but form a single large bundle interrupted only by the eccentric nucleus (Nel) and the numerous mitochondria.


Legend

  • Ncl - nucleus.
  • Mt - Rows of mitochondria appear to divide the contractile substance into myofibril-like units but, unlike the true myofibrils of skeletal muscle, these branch and rejoin and are quite variable in width.
  • Mfl - Myofilaments.
  • Cap - Capillary.

Original image X 6,700.


Links: EM Image | EM Image cells labeled | HM Practical - Cardiac Histology


Reference

<pubmed>4891913</pubmed>| PMC2107571

Copyright

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Original article figure (FIG. 1) has been scaled and rotated.

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current00:45, 5 October 2012Thumbnail for version as of 00:45, 5 October 2012849 × 615 (135 KB)Z8600021 (talk | contribs)Electron micrograph of portions of four cardiac muscle fibers and a capillary (Cap) in transverse section. Myofilaments (Mfl) are not grouped in discrete myofibrils, but form a single large bundle interrupted only by the eccentric nucleus (Nel) and the nu

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