title: Ultrastructure of neuromuscular junctions in Limulus heart.
mesh_terms: D000818:Animals; D003386:Brachyura; D006321:Heart / Q000502:physiology; D009119:Muscle Contraction; D009206:Myocardium / Q000166:cytology*; D009210:Myofibrils; D009469:Neuromuscular Junction / Q000166:cytology*; D012508:Sarcolemma; D013569:Synapses; D013570:Synaptic Membranes; D013572:Synaptic Vesicles