Summary:
- The lymphatic system is a major part of the immune system.
- Lymphocytes are the key cells involved in the immune response.
- They recognize and help destroy particular pathogens in body fluids and cells.
- There are two major types of lymphocytes, called B cells and T cells.
- B cells recognize and respond to antigens on pathogens.
- Antigens are also found on cancer cells and the cells of transplanted organs.
- This is why a transplanted organ may be rejected by the recipient’s immune.
- system.