Salmonella can survive weeks outside the body. This is a transmission electron microscopy image, similar to an SEM in that it uses electron beams but instead of scanning the surface of an object the beam passes through thin sections of a specimen.
Scanning electron micrograph of rods and cones in the eye. Rods are long nerve cells which respond to dim light, enabling images to be detected. Cones are shorter cells which detect color. Rods and cones pass visual signals through the optic nerve to the