This amoeba, a single-celled organism, acquires energy by engulfing nutrients in the form of a yeast cell (red). Through a process called phagocytosis, the amoeba encloses the yeast cell with its ...

This allows us to get down to the world of the cell, and that means some pretty amazing things can be seen. Here's an amoeba engulfing red blood cells and red and white blood cells moving through ...