1. To turn tissue fluid to the blood to maintain blood volume. 2. To protect the body against pathogens and other foreign material.
is the name for tissue fluid that enters lymph capillaries
begins as dead-end lymph capillaries found in most tissue spaces; collect tissue fluid and proteins.
encapsulated masses of lymphatic tissue
small unencapsulated masses of lymphatic tissue
located in the upper left abdominal quadrant behind the stomach
inferior to the thyroid gland; in the fetus and infant the thymus is large with age the thymus shrinks
-produced in red bone marrow. - migrate to the LN, spleen, thymus
in the embryo are produced in the thymus and RBM; migrate to the spleen. lymph nodes, and nodules.
in the embryo are produced in the thymus and RBM; they require the hormones of the thymus for maturation; migrate to the spleen, lymph nodes, and nodules.
does not involve antibodies; is effective against intracellular pathogens, malignant cells, and grafts of foreign tissue.
humoral immunity (adaptive)
is specific and is carried out by lymphocytes and macrophages.
active vs. passive immunity
active: production of one's own antibodies. passive: antibodies from another source
natural vs. artificial immunity
natural: recovery from a disease, with production of antibodies and memory cells. artificial: a vaccine stimulates production of antibodies and memory cells
genetic vs. acquired immunity
genetic: does not involve antibodies; is programmed in DNA acquired: does involve antibodies
are chemical marker that identifies cells.
is the body's ability to destroy pathogens or foreign material and to prevent further infections diseases
innative vs adaptive immunity
innative : is nonspecific, responses are always the same, does not create memory, and does not become more efficient. adaptive: is very specific, may involve antibodies, does create memory, and responses become more effcient