Structure of the midgut epithelium in four diplopod species: histology, histochemistry and ultrastructure

Perinuclear cytoplasm of digestive cells (dc) in millipedes. A. U. transsilvanicus. Cisterns of the rough endoplasmic reticulum (RER), electron-dense residual bodies (rb), mitochondria (m), reserve material (rm). Transverse section. TEM. Scale bar = 0.5 µm. B. E. pulchripes. Cisterns of the rough endoplasmic reticulum (RER), mitochondria (m), spherites (sp), reserve material (rm). Transverse section. TEM. Scale bar = 1.5 µm. C. U. transsilvanicus. Cisterns of the rough endoplasmic reticulum (RER) and Golgi complexes stacks (G), mitochondria (m) and electron-dense residual bodies (rb). TEM. Transverse section. Scale bar = 0.3 µm.