Transmission electron micrograph of a mitochondria from the protist Plasmodium. The use of osmium tetroxide as a fixative for electron microscopy was first described by Dr. Palade at the Rockefeller....

Isolated mitochondria that have been quick-frozen, fractured and deep-etched show some space between the inner and outer membranes. Arcs of tubules, where they are tangentially fractured, show the hel...

Isolated mitochondria that have been quick-frozen, fractured and deep-etched show some space between the inner and outer membranes. Arcs of tubules, where they are tangentially fractured, show the hel...

Figures 222 (upper) and 223 (lower) from Chapter 7 (Mitochondria) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Mitochondrial matrix granules are located within the space bounded by the inner mitocho...

Figure 238 from Chapter 7 (Mitochondria) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Mitochondria from brown adipose cells can attain a diameter of 5 to 7 µm (for scale, compare with the portion o...

Figure 231 from Chapter 7 (Mitochondria) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Dividing mitochondrion in the rat liver. A septum of two membranes forms from the inner membrane. The outer mi...

Figure 239 from Chapter 7 (Mitochondria) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. The cristae of mitochondria can take on zig-zag configuration (see arrows) which is particularly apparent in cel...

Mitochondria can show tremendous variation in size, even within a single cell. Here, a huge spherical mitochondria of about 6-7 µm in diameter is adjacent to small elongate mitochondria 0.5 µm wide...

The internal structure of mitochondria can change in response to physiological demand. Here, after the Sheepshead minnow Cyprinodon variegatus was kept in constant light for 4 weeks, mitochondria fro...

In the basal region of polarized epithelium engaged in ion transport, mitochondria are lodged between the interdigitating membranes of neighboring cells. This example is of a transverse section throu...