The immune response is the body's defense mechanism against harmful invaders, such as bacteria, viruses, and other pathogens. When these invaders enter the body, the immune system recognizes them as foreign and activates various cells and proteins to fight them off. This process involves two main types of immune responses: the innate immune response, which provides immediate but non-specific defense, and the adaptive immune response, which develops a targeted attack and remembers the invaders for future protection. Key players in the immune response include white blood cells, antibodies, and cytokines. White blood cells like T cells and B cells are crucial for identifying and eliminating pathogens. Antibodies are proteins produced by B cells that specifically target and neutralize invaders. Cytokines are signaling molecules that help regulate the immune response, ensuring that the body responds effectively while minimizing damage to its own tissues.