Electron Microscope Studies on Developing Crayfish Oocytes with Special Reference to the Origin of Yolk


The endoplasmic reticulum is composed, in places, of stacks of parallel cisternae which are limited by membranes having great numbers of ribosomes attached to their outer surface. These are connected with other cisternae of similar structure but with fewer ribosomes and without preferred orientation. The latter extend in all directions from the stacked… (More)

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