Watch above a classic movie made by David Rogers at Vanderbilt University in the 1950s. It shows “a neutrophil (a type of white blood cell) chasing a bacterium through a field of red blood cells in a blood smear. After pursuing the bacterium around several red blood cells, the neutrophil finally catches up to and engulfs its prey. In the human body, these cells are an important first line of defense against bacterial infection. The speed of rapid movements such as cell crawling can be most easily measured by the method of direct observation.” This comforting video comes courtesy of the estate of David Rogers, Vanderbilt University.
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