Final Histo - Lymphatic System Flashcards
What structures compose the lymphatic system
diffuse lymphatic tissue lymphatic nodules lymph nodes spleen bone marrow thymus lymphatic vessels
What are the organs of the lymphatic system
lymph nodes
spleen
bone marrow
thymus
What are the major functions of the lymphatic system
drain excess interstitial fluid
immune response
provide an alternative transportation route for hormones, nutrients, and waste products
What is the purpose of draining excess interstitial fluid
to return to blood stream to help maintain normal blood volume
Where does lymph from the left half of the upper body and the entire lower body (3/4 all together) drain
thoracic duct to left IVC and left subclavian
Where does lymph from the right half of the upper body (1/4 all together) drain
right lymphatic duct to right Ivc and right subclavian
These lymphocytes produce and secrete antibodies; involved with humoral immunity
B cells
These lymphocytes differentiate in the thymus; involved with cell-mediated immunity
T cells
These lymphocytes kill transformed cells
natural killer cells
These cells make up 20-30% of all circulating lymphocytes
B cells
These cells make up 60-80% of all circulating lymphocytes
T cells
These cells make up 5-10% of all circulating lymphocytes
NK cells
This is an accumulation of lymphocytes in the lamina propria of the alimentary canal, respiratory, urinary, and reproductive tract
diffuse lymphatic tissue
These are accumulations of lymphocytes also in the walls of the alimentary canal, respiratory, urinary and reproductive tracts
lymphatic nodules
What is the meshwork and cell type of lymphatic nodules
meshwork = reticular cells
cell types = lymphocytes, plasma cells, and eosinophils
This type of lymphatic nodule is an aggregation of primarily small lymphocytes
primary nodule
This type of lymphatic nodule will have a germinal center and a mantle zone (corona)
secondary nodule
Where in there body are there aggregations of lymphatic nodules
tonsils
Peyers patches in ileum
veriform apendix
What does MALT stand for
mucus-associated lymphatic tissue
What does GALT stand for and what is it associated with
gut-associated lymphatic tissue; associated with alimentary tract
What does BALT stand for and what is it associated with
bronchus-assocaited lymphatic tissue; associated with the respiratory system
This is a capsulated organ along the pathway of lymphatic vessels
lymph node
What is the function of a lymph node
filtering system
What are the parts of a lymph node
capsule trabeculae reticular tissue hillum cortex medulla
This is the dense connective tissue portion of a lymph node
trabeculae
This is the meshwork like portion of mesenchymal cells of a lymph nodes
reticular tissue
What are the portions of the cortex of the lymph node
superficial (nodular) cortex deep cortex (paracortex)
What are the portions of the superficial cortex of the lymph node
lymphatic nodules (primary and secondary) germinal centers
What are the portions of the medulla of the lymph node
medullary cords
medullary sinuses
What are the cells in the reticular meshwork
reticular cells
dendritic cells
marcophages
follicular dendritic cells
What is the flow of lymph through the lymph node
afferent lymph vessel subcapsular (cortical) sinus trabecular sinus medullary sinus efferent lymph vessel
This organ is the site of thymic cell education; in which T cells mature and differentiate into immunocompetent T cels
thymus
This organ filters and monitors the blood immunological just as the lymph nodes monitor lymph
spleen
What two pulps does the spleen consist of
red and white pulp
This pulp of the spleen consists of blood filled venous sinuses surrounded by cords of splenic tissue called splenic cords
red pulp
What is the function of the red pulp
blood filtration
This pulp of the spleen consist of mostly lymphocytes aggregating around branches of the splenic artery creating a periarterial lymphatic sheath
white pulp
What is the function of white pulp
carry out immune functions similar to lymph nodes
