Scanning electron micrograph of a hamster oocyte cumulus complex. Cumulus cells (purple) and matrix (gray) are shown. Small blood clots (red) also often appear in oocyte cumulus complexes. The red blo...

Confocal micrograph of a stimulated mast cell that has just exploded releasing numerous histamine granules. The remains of the cell are seen towards the lower left, still containing a number of granul...

Colorized transmission electron microscope image of a mast cell full of histamine granules (pink). Histamine is released as part of an allergic reaction. The diameter of the cell is approx. 8.4 microm...

A scanning electron microscope image of an activated mast cell illustrating the convoluted topography of the cell membrane, which is populated with receptors.

Confocal micrograph showing the hormone-producing enteroendocrine cells of the Drosophila melanogaster adult midgut. The enteroendocrine cell nuclei are labelled with an anti-Prospero antibody (red), ...

Hamster oocyte and cumulus cells. This scanning electron micrograph shows a hamster oocyte. The oocyte is not directly visible but lies beneath the zona pellucida. The surface of the zona pellucida c...

Colorized scanning electron micrograph of a human egg. The egg is surrounded by a glycoprotein coat called the zona pellucida which aids in trapping and binding the sperm. Two residual coronal cells f...

Figure 189 from Chapter 5 (Endoplasmic Reticulum) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. A High magnification electron micrograph of smooth endoplasmic reticulum from an adrenal cortical cell ...

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...