Lymphoid Tissue Flashcards
Dendritic cell alternate description
“professional” antigen presenting cell
What is the difference between a primary and secondary lymphatic nodule?
secondary lymphatic nodules contain a large germinal center
What organ is required for development of secondary lymphatic nodules?
thymus
T/F
Lymphatic nodules are found exclusively in the thymus
F
no lymphatic nodules are found in the thymus
Tonsils are an example of a _________ nodular lymphatic tissue
non-encapsulated
What component of lymph nodes is responsible for “filtering” the lymph?
macrophages
Reticular cells are also known as…
fibroblasts
These are the 3 components of lymph nodes
capsule
trabeculae
stroma
This component of lymph nodes contains lymphocytes
stroma (bodies are made of cells, right?)
What type of structural fiber is found at high concentrations in lymph nodes?
reticular fibers
Reticular fibers are made of what type of collagen?
type III
Which cell type lines the sinusoids of lymph nodes?
endothelial cells
This is an important attachment molecule in the blood-thymus barrier
desmosomes
This is an important attachment molecule in the blood-thymus barrier
desmosomes
Which type of lymphatic vessels are present in the spleen: afferent or efferent?
efferent only
The hilus of the spleen contains these structures
afferent/efferent blood vessels
efferent lymph vessels
sympathetic nerves
What are trabeculae in the spleen?
invaginations of connective tissue capsule in pulp-containing regions
Periarterial lymphatic sheaths are found in red/white pulp of spleen
white
Periarterial lymphatic sheaths contain primarily B-/T-cells
T-cells
Splenic/lymphatic nodules contain primarily B-/T-cells
B-cells
Two important but difficult to see structures in splenic red pulp
splenic sinuses splenic cords (Billroth cords)
The marginal red pulp zone contains what type of arteries?
follicular arteries–branches of central arteries
The marginal red pulp zone contains what type of arteries?
follicular arteries–branches of central arteries
What is the function of the marginal zone?
this is where lymphoid cells leave blood circulation
