File:Cardiac muscle EM02.jpg: Difference between revisions
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* '''Image Top''' - 2 contractile units (sarcomere) are shown by white arrows. The A and I bands, shown by black arrows, are the regions visible by light microscope as cross-striations. | * '''Image Top''' - In a cardiomyocyte (cardiac muscle cell) 2 contractile units (sarcomere) are shown by white arrows. The A and I bands, shown by black arrows, are the regions visible by light microscope as cross-striations. | ||
* '''Image Bottom''' - The 2 cardiomyocytes (cardiac muscle cells) are coloured (labeled cell 1 and cell 2) and capillary (red) | * '''Image Bottom''' - The 2 cardiomyocytes (cardiac muscle cells) are coloured (labeled cell 1 and cell 2) and are joined by an intercalated disc. | ||
* '''Image Bottom Right''' - A capillary (red) enclosed by an endothelial cell and its basement membrane contains a red blood cell. | |||
===Legend=== | ===Legend=== |
Revision as of 07:56, 7 August 2012
Cardiac Muscle Electron Micrograph
Electron micrograph of parts of three cat cardiac muscle fibers and an adjacent capillary in longitudinal section. This is a historic (1969) EM showing key features in cardiac muscle ultrastructure. Only the intercalated disc and some cross-striations can typically be seen in the light microscope histology slides.
- Image Top - In a cardiomyocyte (cardiac muscle cell) 2 contractile units (sarcomere) are shown by white arrows. The A and I bands, shown by black arrows, are the regions visible by light microscope as cross-striations.
- Image Bottom - The 2 cardiomyocytes (cardiac muscle cells) are coloured (labeled cell 1 and cell 2) and are joined by an intercalated disc.
- Image Bottom Right - A capillary (red) enclosed by an endothelial cell and its basement membrane contains a red blood cell.
Legend
- In D - Intercalated disc, the two lower cells are joined end to end by a typical steplike intercalated disc.
- 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.
- Lp - Lipid droplets somewhat distorted in specimen preparation are found between the ends of the mitochondria.
- Cap - Capillary.
Original image X 15,000.
Reference
<pubmed>4891913</pubmed>| PMC2107571
Copyright
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Original article figure (FIG. 1) has been scaled and rotated. Labels and colours have also been added to the original image.
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14:35, 6 August 2012 | 1,072 × 735 (222 KB) | Z8600021 (talk | contribs) | ==Cardiac Muscle Electron Micrograph== Electron micrograph of parts of three cat cardiac muscle fibers and an adjacent capillary in longitudinal section. This is a historic (1969) EM showing key features in cardiac muscle ultrastructure. Only the interca |
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