Neutrophil granulocytes, generally referred to as neutrophils, are the most abundant type of white blood cells in humans and form an essential part of the immune system. Watch as this crawling Neutrophil chases down a bacterium in this short video from the 1950s.
[Crawling Neutrophil Chasing a Bacterium – YouTube]
How does it know how to track things? It’s amazing to think this kind of activity is happening inside our bodies all the time.