BIOLOGICAL TRANSPORT 



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Figure 2 Wall of a blood capillary in skeletal muscle of the rat. 

 Small vesicles in the cytoplasm of the endothelial cells are shown; some 

 of these are described as open to the cell surface and others as closed and 

 probably deeper in the cytoplasm. Magnification X 7 3, 000. [Fro?n Palade, 

 G. E. (1961), Circulation, 24, 371; reproduced with permission.'] 



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