Introduction: Cellular Structure and Function
All organisms are made of cells. Complex organisms (such as humans) are made up of collections of highly specialized cells, each with its own specific function. Different types of cells have evolved specific shapes and properties which help them do their jobs inside the organism.
Mouse embryonic stem cells - movie 2
Mouse embryonic stem cells move, grow, and divide in culture.

This movie was taken over a 12-hour period.
Pluripotent mouse embryonic stem cells were cultured using standard techiniques. For imaging, cells in suspension were transferred to small, sterile plexiglass chambers attached to a coverslip. Cells were maintained on an inverted compound microscope in an environmental chamber kept at 37°C, 7.0% CO2. Images were taken with a 40x phase contrast objective and a digital camera.