lymphoid structures Flashcards
what is in the LN follicle?
B cell proliferation
dense dormant 1ary follicles
pale active 2ary follicles with germinal ctr
what is in LN medulla?
cords - packed lymphocytes and plasma cells
sinuses - reticular cells and macrophages; communicate with efferent lymph
what is in LN paracortex?
T cells
high endothelial venules (B and T cells enter from blood)
what part of the body does the R lymphatic duct drain?
R side above diaphragm
thoracic duct drains all else
where does the thoracic duct empty?
junction of L subclavian and IJ
what’s in the red pulp of the spleen?
RBCs
what’s in the periarteriolar sheath of the spleen?
T cells (white pulp)
what’s in the follicles of the spleen?
B cells (white pulp)
what’s in the marginal zone of the spleen?
APCs and specialized B cells
where blood-borne antigens are captured by APCs
blood findings post-splenectomy?
Howell-Jolly
targets
thrombocytosis
lymphocytosis
where does the thymus come from?
third pharyngeal pouch
what kinds of cells are in the thymus cortex?
immature, densely packed
what kinds of cells are in the thymus medulla
mature T cells
Hassall corpuscles - contain epithelial reticular cells
