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Fig. 2 | Applied Microscopy

Fig. 2

From: Fine structure of the intercalated disc and cardiac junctions in the black widow spider Latrodectus mactans

Fig. 2

Transmission electron micrographs of the intercalated discs of the cardiac muscles in L. mactans. a: The intercalated disc (Cd) at the ends of muscle cells consist of extensive folds and intercellular junctions. b: Each muscle fiber contains plenty of mitochondria (Mi) for cardiac contraction. Each rectangle represents the location of Z-line of sarcomeres. c: The sarcolemma (Sm) of the intercalated disc shows a scalloped appearance with Z-line connections to sarcolemmal membranes (rectangles). d: Intercalated discs are part of the cardiac muscle sarcolemma and they contain a network of cellular junctions (arrows). Nu: nucleus. All scale bar indicates 2 μm

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