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Fig. 4 | Applied Microscopy

Fig. 4

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

Fig. 4

Transmission electron micrographs of the cardiac muscle cell and its neural innervation in the spider L. mactans. a, b: Sarcolemma (Sm) is connected with the basement membrane which surrounds connective tissues (Ct), or to other muscle cells creating a very strong fiber. c, d: Cardiac muscle fiber is innervated by neural bundles containing axons (Ax) from neurons of the cardiac ganglion. d: Neuronal axons are connected to the individual muscle fibers at the neuromuscular junction. Mf: myofbril, Mi: mitochondria, Nu: nucleus, Tt: T-tubules. All scale bar indicates 2 μm

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