You opened my wound and the contents got into my wound.
The third line of defense for the body is specific resistance. This scenario explains the body's defense after the first and second defense have failed.
The third line of defense of the body is a defense against antigens. Antigens are substances in the pathogens. Antigens give the body a reason to respond to pathogens. If an antigen is detected the body's T- Cells are activated.
The antigens of the pathogens are detected by the macrophages which then goes through phagocytosis. The pathogen is then trapped in the internal vesicle. The human body contains millions of T- Cells and each T- Cell is able to respond to a specific antigen.
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The body's immune response uses T- Cells and B cells to recognize and kill microbes. When T- cells stimulate b- cells to divide the process forms plasma cells. Plasma cells form antibodies and memory b- cells. Antibodies are a type of protein that are in the shape of a Y that attack microbes by attaching to specific antigens.
Many different T- Cells have different functions. One type is the helper T- cells, they employ more cells to help fight the pathogens. Some other are killer T- Cells and suppressor T- Cells. The killer T- cells kills all foreign cells. Suppressor, T- cells adjust the immune system and prevent autoimmune disease.
B- Cells are a type of white blood cell that fight bacteria by crating more antibodies. They can form cells like a memory b-cell that remembers a pathogen. If a pathogen that is already known by the b-cell appears the b-cell will be able to produce more antibodies at a faster rate to combat the pathogen. Finally, the process of antigen attaching to a T- cell that have specific receptors of that antigen is called clonal selection.