ELECTRON IVIICROSCOPY 



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Fig. 4. Typical arrangement of microvilli (V) on the surface of an epithelial cell 

 in the distal tubule of the mouse kidney. The microvilli are slender, short processes 

 with seemingly poor rigidity, usually widely spaced. Mitochondria (M) are seen to- 

 gether with a few small vesicles in the apical cytoplasm. Magnification 15,000X 



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M 





Fig. 5. Brush border extensions of the mouse intestinal mucosa. Brush borders 

 are closely packed, rather rigid surface processes. They display a higher density than 

 the microvilli. Some mitochondria (M) and several absorbed lipid droplets (L) are 

 seen. Magnification 28,000X 



96 



