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Chapter 20
The Lymphatic System
| Question | Answer |
|---|---|
| 3 basic components of lymphatic system | lymph vessels, lymph nodes & lymph |
| what carries fluid back into the tissues? | lymph vessels |
| lymph is the ___ | interstital fluid being collected |
| what are the filtering checkpoints to make sure everything is okay? | lymph nodes |
| the lymphatic vessels form a 1-way system which lymph only flows ___ | towards the heart |
| this duct drains lymph from right arm and side of body? | right lymphatic duct |
| a special set of lymphatic capillaries that transports fat from the small intestine to the bloodstream is known as.... | lacteals |
| the thoracic duct is responsible for ___ | |
| lymphocytes protect the body against __ | antigens |
| macrophages | eat foreign substances - activate T cells |
| this type of cell capture antigens and bring them to the lymph nodes? | dendritic cells |
| which cell produce a network of lymphoid tissues? | reticular cells |
| the lymphatic system functions in returning fluids ___ | that have leaked from the tissues back to the blood |
| what is absent in bone, teeth, bone marow & entire CNS? | lymphatic capillaries |
| __ cells initiate immune response | dendritic |
| lymph enters lymph nodes via __ vessels and exit via __ vessels | afferent- efferent |
| why are there fewer efferent vessels? | allows time for cleansing |
| blood cell production occurs in the __ which is the maturation of __ cells | bone marrow - B |
| lymph nodes functions in ___ and ___ | cleansing the lymph - immune system activation |
| maturation sites are the ___ lymphoid organs | primary |
| the secondary lymphoid are exposed to antigens. these include __, __ and ___ | MALT - spleen - thymus |
| this lymphoid organ is the site for proliferation & immune surveillance and response. | spleen |
| this organ is responsible for cleaning the blood, recycling RBC's, stores platelets & monocytes. | spleen |
| what lymphoid organ is most active in early childhood? | thymus |
| maturation for T cells. | thymus |
| ______ is so permeable that they were thought to be open at one end like a straw. | lymphatic capillaries |
| why are lymphatic capillaries so permeable? | endothelial cells forming the walls of lymphatic capillaries are not tightly joined |
| when fluid pressure in the interstitial space is greater than pressure in the lymphatic capillary, what happens? | minvalves open allowing fluid to enter capillary |
| when fluid pressure is greater inside the lymphatic capillary, the minivalves.... | are forced shut - preventing lymph from leaking back in |
| the daughter cells of B cells are known as__ | plasma cells |
| what type of lymphoid tissue is found in almost every organ in the body? | diffuse lymphoid tissue |
| the ___ cells circulate continuously between the blood, lymph nodes, and lymph performing their surveillance role. | T |
| all lymphoid organs are composed of reticular connective tissue except for the__ | thymus |
| the lymphatic vessels help maintain ___ | blood volume |
| if the spleen must be removed, what 2 organs take over most of its functions? | bone marrow & liver |
| what is the only organ that doesn't directly fight antigens? | thymus |
| the thymus has no follicles because... | it lacks B cells |
| muscoa-associated lymphoid tissues (MALT) are... | lymphoid tissues located in mucous membranes |
| ___ helps protect us from pathogens that seek to enter our body | MALT |
| what gathers and remove many of the pathogens entering the pharynx in food or inhaled air? | tonsils |
| large clusters of lymphoid particles are called: | peyer patches |
| the appendix is responsible for destroying bacteria and ___ | making "memory" lymphocytes for long term immunity |
| each lymph node contains a fibrous capsule, __ and ___ | cortex - medulla |
| in the lymph node..the cortex __ | act on immune responses |
| what does the medulla of the lymph node do? | contains macrophages - eat debris |
Created by:
Mariahj25
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