Here a lung (alveolar) macrophage is seeking foreign bacteria (Escherichia coli) with specialized cell extensions called filopodia. Macrophages engulf and digest foreign materials in a process known as phagocytosis.
The lymphocyte, a star within. Very poetic looking coloured scanning electron micrograph (SEM) of a lymphocyte white blood cell. Lymphocytes are involved in the immune system's defence mechanisms, lymph system, and involved in antibody production.
Coloured SEM of a cultured cancer cell moving through a hole in a support film. Numerous pseudopodia, fillipodia and surface blebs can be seen and are characteristic of highly mobile cells which enable them to metastasise rapidly.