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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. | 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. | ||
Bottom - The 2 cardiomyocytes (cell 1 and cell 2) and capillary (red) are labeled. | |||
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. | |||
* '''In D''' - Intercalated disc, the two lower cells are joined end to end by a typical steplike intercalated disc. | * '''In D''' - Intercalated disc, the two lower cells are joined end to end by a typical steplike intercalated disc. | ||
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Original article figure (FIG. 1) has been scaled and rotated. | Original article figure (FIG. 1) has been scaled and rotated. Labels and colours have also been added to the original image. | ||
[[Category:Cardiovascular]] [[Category:Cat]] [[Category:Heart]] [[Category:Electron Micrograph]] | [[Category:Cardiovascular]] [[Category:Cat]] [[Category:Heart]] [[Category:Electron Micrograph]] | ||
Revision as of 14:43, 6 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.
Bottom - The 2 cardiomyocytes (cell 1 and cell 2) and capillary (red) are labeled.
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.
- 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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| current | 14:39, 6 August 2012 |  | 1,072 × 735 (224 KB) | Z8600021 (talk | contribs) | |
| 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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