

♦^ n 



^3 



7 Fine structure in the cell interior. Electron micrograph of a cell 

 from the pancreas, showing sub-microsomes (small round bodies 

 attached to the microsomal membranes). The large sausage-shaped 

 object is a mitochondrion. (From Sjostrand and Hanson, Exp. Cell 

 Research, 7, 393, 1954) 



