lymphatic system teacher review

afferent lymphatic vessels

carry lymph into lymph node

efferent lymph vessles

carry lymph out of lymph node

helper t lymphocytes 

secrete cytokins activating other lymphatic cells 

what are erythrocyte

red blood cells

B lymphocytes

through mitosis become plasma cells and build memory cells and build antibodies

natural killer cells

responds to more than one type of antigen

how do lymphoid organs differ from lymphoid nodules

dont have a connective tissue capsule

b cells are in…

germinal center nodule

t lymphocytes are in..

surrounding germinal center nodule

what are the lymphoid organs

thymus, lymph nodes, spleen (red and white pulp)

where are mature t lymphocytes most active in adolensence

thymus

lymph nodes 

filter antigens from lymph 

slpeen

filter antigens from blood

white pulp in spleen are…

arterial supply, clusters of t and b cells, encounter antigens initiating immune response

red pulp in spleen are…

associated with venous return , splenic cords and splenic sinusoids 

splenic cords are…

red blood cells suspended on reticular connective tissue (spleen = blood reservoir)

splenic sinusoids

where cells enter and can exit the spleen to remove old/damaged blood

thymus is

mature t cells