click below
click below
Normal Size Small Size show me how
immune/lymphatic
systems
Term | Definition |
---|---|
lymph nodes | small, glandular structures concentrated in the neck, axilla, and groin, which produce and store lymphocytes, and are home to macrophages that filter lymph |
lymph nodules | masses of lymphoid tissue comprised of macrophages and lymphocytes. lymph nodules are not encapsulated like lymph nodes. |
thymus | located posterior to the sternum. the thymus is large in children and atrophies after adolescence. it is responsible for the production and maturation of T-cells. |
spleen | largest lymphoid organ, located in the upper-left abdominal quadrant. it is home to macrophages that filter blood. |
interstitial fluid | tissue fluid found between cells. once collected and filtered, its called lymph. |
antigen | foreign substance within the body |
antibody | protein the body creates in response to specific antigens |
immunoglobulins | antibodies |
B-cells | type of lymphocyte that can recognize antigens and responds by turning into plasma cells. these plasma cells then create antibodies against specific antigens. |
T-cells | type of lymphocyte that can recognize antigens and attaches to them to attack the invading cells directly. |
monocytes | engulf and destroy pathogens that have been coagulated with antibodies |
naturally acquired active immunity | this occurs when a person has an infectious disease and then develops antibodies against the pathogen that caused the disease. the antibodies have a memory that prevents future infections by the same pathogen. |
naturally acquired passive immunity | this is short-lasting immunity passed from mother to child through placenta and breast milk. |
artificially acquired active immunity | this type of immunity is the result of administering a vaccination. the antibodies are activated by the vaccine and develop memory to recognize the pathogen in the future. |
artificially acquired passive immunity | also short-lasting immunity, this is created by giving an exposed person antibodies from a person who has previously had the disease. |