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They circulate around our body in the bloodstream, and when they sense signals that an infection is present, they are the first cells to migrate to the site of the infection to begin killing the invading microbes.
Neutrophils are also called 'polymorphonuclear cells.' This big, intimidating word just means that the neutrophil nucleus has a complex, lobulated shape.
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This means that there are plenty of them around to respond to microbial invaders. Their granules contain antimicrobial effectors, which you can imagine as our body's natural antibiotics. Not only are you predator of the universe, you’re big, scary, and go Jeep-tipping just for fun.Your teeth are knives, and you don’t take “no” for an answer. Even though you have a brave exterior, on the inside you’re as warm and fuzzy as a newborn kitten.That's because our immune system is constantly on guard, protecting us from infections.In this lesson, learn about neutrophils, the first responders of the immune system.