The Lymphatic System
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| 3 basic components of lymphatic system | lymph vessels, lymph nodes & lymph
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| what carries fluid back into the tissues? | lymph vessels
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| lymph is the ___ | interstital fluid being collected
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| what are the filtering checkpoints to make sure everything is okay? | lymph nodes
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| the lymphatic vessels form a 1-way system which lymph only flows ___ | towards the heart
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| this duct drains lymph from right arm and side of body? | right lymphatic duct
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| a special set of lymphatic capillaries that transports fat from the small intestine to the bloodstream is known as.... | lacteals
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| the thoracic duct is responsible for ___ |
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| lymphocytes protect the body against __ | antigens
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| macrophages | eat foreign substances - activate T cells
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| this type of cell capture antigens and bring them to the lymph nodes? | dendritic cells
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| which cell produce a network of lymphoid tissues? | reticular cells
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| the lymphatic system functions in returning fluids ___ | that have leaked from the tissues back to the blood
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| what is absent in bone, teeth, bone marow & entire CNS? | lymphatic capillaries
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| __ cells initiate immune response | dendritic
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| lymph enters lymph nodes via __ vessels and exit via __ vessels | afferent- efferent
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| why are there fewer efferent vessels? | allows time for cleansing
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| blood cell production occurs in the __ which is the maturation of __ cells | bone marrow - B
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| lymph nodes functions in ___ and ___ | cleansing the lymph - immune system activation
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| maturation sites are the ___ lymphoid organs | primary
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| the secondary lymphoid are exposed to antigens. these include __, __ and ___ | MALT - spleen - thymus
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| this lymphoid organ is the site for proliferation & immune surveillance and response. | spleen
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| this organ is responsible for cleaning the blood, recycling RBC's, stores platelets & monocytes. | spleen
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| what lymphoid organ is most active in early childhood? | thymus
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| maturation for T cells. | thymus
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| ______ is so permeable that they were thought to be open at one end like a straw. | lymphatic capillaries
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| why are lymphatic capillaries so permeable? | endothelial cells forming the walls of lymphatic capillaries are not tightly joined
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| when fluid pressure in the interstitial space is greater than pressure in the lymphatic capillary, what happens? | minvalves open allowing fluid to enter capillary
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| when fluid pressure is greater inside the lymphatic capillary, the minivalves.... | are forced shut - preventing lymph from leaking back in
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| the daughter cells of B cells are known as__ | plasma cells
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| what type of lymphoid tissue is found in almost every organ in the body? | diffuse lymphoid tissue
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| the ___ cells circulate continuously between the blood, lymph nodes, and lymph performing their surveillance role. | T
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| all lymphoid organs are composed of reticular connective tissue except for the__ | thymus
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| the lymphatic vessels help maintain ___ | blood volume
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| if the spleen must be removed, what 2 organs take over most of its functions? | bone marrow & liver
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| what is the only organ that doesn't directly fight antigens? | thymus
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| the thymus has no follicles because... | it lacks B cells
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| muscoa-associated lymphoid tissues (MALT) are... | lymphoid tissues located in mucous membranes
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| ___ helps protect us from pathogens that seek to enter our body | MALT
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| what gathers and remove many of the pathogens entering the pharynx in food or inhaled air? | tonsils
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| large clusters of lymphoid particles are called: | peyer patches
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| the appendix is responsible for destroying bacteria and ___ | making "memory" lymphocytes for long term immunity
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| each lymph node contains a fibrous capsule, __ and ___ | cortex - medulla
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| in the lymph node..the cortex __ | act on immune responses
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| what does the medulla of the lymph node do? | contains macrophages - eat debris
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