 There are two distinct aspects of the immune response, the innate and the adaptive, which work together to protect against pathogens.The innate branch—the body's first reaction to an invader—is known to be a non-specific and quick response to any sort of pathogen.Components of the innate immune response include physical barriers like the skin and mucous membranes, immune cells such as neutrophils, macrophages, and monocytes, and soluble factors including cytokines and complement.