Neutrophils (IMAGE) Cold Spring Harbor Laboratory Caption A high resolution microscopic image of a neutrophil extracellular trap (NET). Neutrophils (colored green) are white blood cells that help the immune system fight off invaders. Neutrophils can commit suicide and spill out DNA and chemical signals into a sticky network of filaments (colored yellow). These networks or NETs can recruit additional neutrophils. Having too many neutrophils can lead to tissue damage. Credit Jose M. Adrover/Egeblad lab/CSHL, 2022 Usage Restrictions Attribution required License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.