Fig. 7. Motor nerve branches in the swimbladder muscle (SBM). Note nerve branches
running along the SBM fibres. (A) Golgi silver impregnation of nerve branches
running along the SBM fibres. (B) Dense distribution of endplates with
cholinesterase activity in the SBM fibre. Bars, 200 µm (A); 100 µm
(B).