Intersegmental muscle fibers of Himantarium gabrielis are investigated by electron microscopy. The distribution of myofibrils and mitochondria, the relationships between cell mem branes, sarcoplasmic reticulum and T-system tubules, are described in longitudinal and transversal sections of contracted and stretched fibers. Neuromuscular junctions appear numerous on each fiber. At the region of nerve-muscle contact basement membranes of lemnoblast cover several axons. At the synaptic regions the plasma membranes of axon and of muscle fiber are closely apposed.
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Con il contributo del Ministero per i Beni e le Attività Culturali