Answer:
An immune response is a complex series of events involving increased blood flow, recruitment of immune cells and clotting chemicals to enhance the body's immune system.
Step-by-step explanation:
An immune response is the body's response mechanism to protect itself from invasion by pathogens such as parasites, bacteria, viruses and fungi.
The immune response is composed of two systems or branches: (i) the innate immune response and (ii) the adaptive immune response.
Innate immune response: the innate immune response is an inborn or natural response mechanism which provides the body with its first line of defense against infection. It is composed of two parts (i) the physical and chemical barriers such as the skin and mucous membranes, and (ii) no-specific innate response which involves cytokines, complement proteins as well as phagocytic cells such as neutrophils, basophils and mast cells.
Adaptive or acquired immune response: This is a specific immune response to previously encountered pathogens. It include cells such as dendritic cells, T cell, and B cells as well as antibodies.
B cells are responsible for immune response involving antibodies, whereas T cells are involved in immune responses by the immune cells.