FIGURE 1-12 Subcellular organization of eukaryotic cells. (a) Schematic overview of a “typical” animal cell (top) and plant cell (bottom) and their major substructures. Not every cell type will contain all the organelles, granules, and fibrous structures shown here, and other substructures can be present in some cell types. Cells also differ considerably in shape and in the prominence of various organelles and substructures. (b) Electron micrograph of a plasma cell, a type of white blood cell that secretes antibodies, showing some of the larger organelles.

[Part (b) courtesy of I. D. J. Burdett and R. G. E. Murray.]