Cathelicidins are a family of antimicrobial peptides that play a crucial role in the immune response of many animals, including humans. They are produced by various cells, particularly in the skin and mucosal surfaces, and help defend against bacterial, viral, and fungal infections. These peptides work by disrupting the membranes of pathogens, leading to their destruction. In addition to their antimicrobial properties, cathelicidins also have roles in inflammation and wound healing, making them important for overall health and recovery from injuries.