PATHOLOGY

Detailed explanation-1: -The third line of defense are the specific lymphocytes that produce antibodies as part of the adaptive immune response.

Detailed explanation-2: -What is the body’s third line of defence against pathogens? The third level of your immune system consists of cells tailor-made to get rid of the specific microorganisms that have invaded your tissue. Special cells called dendritic cells are the liaison (point of communication) between innate and adaptive immunity.

Detailed explanation-3: -If pathogens do get through, your body activates the third line of defense, which is your specific immune system. Your specific immune system is made of white blood cells called lymphocytes: B-cells and T-cells.

Detailed explanation-4: -Type 3 immunity is characterized by the recruitment of neutrophils and the stimulation of epithelial antimicrobial defenses at infection sites. Type 3 immunity is often triggered by extracellular bacteria and fungi and seems to be particularly suited to defend epithelial barriers against these pathogens.