False-colour scannning electron micrograph of a T-lymphocyte killer cell (small cell at left), attacking a large cancer tumour cell. The T- lymphocyte, a white blood cell, must make intimate contact with the tumour cell. It does so by recognizing antigens on the tumour’s surface.
A freeze fracture scanning electron micrograph of a single cell. The cell nucleus is orange. The small black holes are nuclear pores. The cell membranes are purple, the endoplasmic reticulum is pink, and the golgi apparatus is green. Image credit; Lennart Nilsson
Cochlea from Inner Ear. Color-enhanced scanning electron micrograph of the inside of a guinea pig inner ear showing the hearing organ, or cochlea. Running along the spiral structure are rows of sensory cells which respond to different frequencies of sound. The whole organ is just a few millimeters long.