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Questions and Answers List

Question	Answer
Largest single mass of lymphatic tissue in the body. Located in the hypochondiac region. Destroys worn out or defective RBCs, platelets by macrophages. Active participant in immune response. Storage site for platelets and RBCs.	Spleen
Wide variety of body responses to a wide range of pathogens. Present at birth. defense mechanisms that provide general protection against a wide ranges of pathogens.	Innate immunity
Involves activation of specific lymphocytes	Adaptive immunity
Specialized reticular tissue containing many lymphocytes: Thymus, spleen, tonsils.	Lymphoid tissue
Drains excess interstitial fluid, transports dietary lipids. Carries out immune response.	3 Functions of lymphatic system
Organs where immune cells become immunocompetent. red bone marrow where b- cells activated. Thymus where t cells activated.	Primary Lymphatic organs
Site where most immune responses occur. Lymph nodes, spleen, lymphatic nodules.	Secondary lymphatic organs
Contains large numbers of T-cells, dendritic cells (derived from monocytes)	Thymus
carries lymph to the node	afferent vessels
Carries lymph away from the node back to the heart.	Efferent vessels
Contains T-cells, B- cells, Plasma cells, Macrophages, dendritic cells	Lymph node
Interstitial tissue, afferent lymphatic vessel, subscapsular sinus, trabecular sinus, medullary sinus, efferent lymphatic vessel.	Flow of lymph through a node
the spreading of a disease (especially cancer) to another part of the body	Metastasis