Medicine Science

The immune system in action

Sure, this is old, but I hadn’t seen a video quite this cool before. Behold, a human polymorphonuclear leukocyte (PMN, or neutrophil) on a blood film, “chasing” Staphylococcus aureus. There are more videos of cells in action here. It never ceases to amaze me how cells can detect biochemical gradients over such short distances and […]