Fig. 2From: Effect of acute salinity stress on ion homeostasis, Na+/K+-ATPase and histological structure in sea cucumber Apostichopus japonicus Light microscopy micrographs of the respiratory trees of A. japonicus (×20). a Control (32 psu); b salinity 18 psu; c salinity 23 psu; d salinity 27 psu; e salinity 40 psu. ce coelomic epithelium, ml muscular layer, ct connective tissue, in infusoria, le lining epithelium. Scale bar 50 μmBack to article page