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Muscle
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| A. Smooth Muscle |
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Intestine, H&E. See Fig. 16.1 for orientation and Plates 77 and 78 for details of the muscularis externa of the intestinal wall. Note that the muscle cells of the inner layer of the muscularis externa are oriented circumferentially around the intestine while those of the outer layer are oriented longitudinally. |
| B. Skeletal Muscle |
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Skeletal muscle, l.s.; H&E. |
| Skeletal muscle, x.s.; H&E. | ||||
| Skeletal muscle, l.s.; Iron hematoxylin. | ||||
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Skeletal muscle, x.s.; Iron hematoxylin. | |||
| C. Cardiac Muscle |
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Heart muscle, l.s.; H&E. or IH (24). Look for centrally located nuclei and intercalated discs. | |
| Heart muscle, x.s.; H&E. | ||||
| Heart muscle, l.s.; Iron hematoxylin. | ||||
| Heart muscle, x.s.; Iron hematoxylin. | ||||
| Heart muscle, oblique section; Iron hematoxylin. Look for branching cardiac muscle cells. | ||||
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Heart muscle, teased, H& E. In this preparation the muscle fibers have been teased apart, revealing the branching nature of the cardiac muscle fibers. | |
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Heart muscle, Purkinje fibers, IH (25) and H&E (26). Look for large, hypertrophied muscle fibers with lightly stained interiors. | |
| D. Musculotendonous Junction |
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Muscle-tendon junction, mammal, H&E. |
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