Figures 417 (upper) and 418 (lower) from Chapter 16 (Cytoplasmic matrix and cytoskeleton) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. A marginal bundle of microtubules is associated with the ellipti...

Figure 375 from Chapter 15 (Cytoplasmic Inclusions) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Freeze-fracture replica of a cell from rat adrenal medulla. Using this technique, secretory vesicles...

Light micrograph of human ovum (egg) and sperm. The ovum is much larger than the sperm and is surrounded by protective cumulus cells around the outside surface (yellow). The membrane surrounding the o...

Figure 187 from Chapter 5 (Endoplasmic Reticulum) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. An abundance of smooth endoplasmic reticulum is apparent in this Leydig cell of the opossum testes, ass...

Figures 284 (upper) and 285 (lower) from Chapter 9 (Peroxisomes) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Diaminobenzidene reacts with peroxidase to produce a dense reaction product in the perox...

Figure 391 from Chapter 15 (Cytoplasmic Inclusions) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Secretory granules of a mast cell from rat connective tissue. Secretory granules in this cell type ar...

Confocal micrograph of a mast cell in human eye with conjunctivitis. This image shows a single mast cell invading conjunctival tissue in response to an inflammatory agent or pathogen. The mast cell c...

Gap junctions from a granulosa cell of a rat ovarian follicle. Variability in size of the gap junctions is likely an artifact of the freeze fracture preparation. Figure 99 from Chapter 3 (Junctional ...

Steriod-secreting cells exhibit unusual diversity in the cristae of their mitochrondria, like these examples from testicular Leydig cells of the ground squirrel Citellus lateralis. Small alveolar cri...