Scanning electron micrograph showing tentacles on the head of a Hydra viridis. Epithelial cells located at the base of the tentacle are in a flat, contracted state. Cell distal to the head of the H. v...

Scanning electron micrograph showing the tip of a Hydra viridis tentacle. A meshwork of triggered nematocyst cells is visible. When hooked cnidocytes on the surface of the tentacle come in contact wit...

Scanning electron micrograph showing tentacles on the head of a Hydra viridis. Epithelial cells located at the base of the tentacle are in a flat, contracted state. Cell distal to the head of the H. v...

Red blood cells (erythrocytes). This image of human red blood cells obtained by scanning electron microscopy, revealing their characteristic biconcave shape.

Liver sinusoid of a Brown Rat with fenestrated endothelial cells. Sinusoidal width is about 5 microns. Original magnification is 10,000x . Note the microvilli of hepatocytes in the space of Disse exte...

Fenestrae of a Brown Rat arranged in sieve plates. Original magnification is 20,000x, a good indication of liver sinudosial endothelial cells (LESCs).

Single promastigote form Leishmania mexicana cell as seen by scanning electron microscopy. Promastigote form Leishmania mexicana (WHO strain MNYC/BZ/62/M379) were grown in M199 (10% FCS, pH 7.4, 28°C...

Scanning electron micrograph reveals microvilli on the surface of HeLa cells in culture. Image by Keith Porter. Figure 31 from Chapter 2 (Specializations of the Free Surface) of 'The Cell, 2nd Ed.' b...

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

Scanning electron micrograph of the calcium skeleton of coral polyp. The sample was cleaned with bleach solution, dried and carbon coated prior to imaging. The image was collected using a secondary...