6分弹趣 状细刷 会Q一淋巴胞 2) Lymphoid tissue米含了 刘状细 -reticular T 神釬维 o reticular cell: stellate-shaped with processes to form network reticular fiber ymphocytes, macrophage, plasma cell and mast cell
2) Lymphoid tissue ---reticular T: reticular cell: stellate-shaped with processes to form network reticular fiber ---lymphocytes, macrophage, plasma cell and mast cell
a. diffuse lt e no clear boundary ● mainly consists of TLC ● postcapillary venules high endothelial venules opening for LC enter LT from blood
a. Diffuse LT: no clear boundary mainly consists of TLC postcapillary venules: -high endothelial venules -opening for LC enter LT from blood
b Lymphoid nodule e spherical or ovoid have clear boundaries mainly composed of BLC germinal center: stained pale primary LN> secondary LN
b. Lymphoid nodule: spherical or ovoid have clear boundaries mainly composed of BLC germinal center: stained pale * primary LN → secondary LN
3)Lymphoid organs a.Central lymphoid organs: thymus, /bone marrow developed earlier blood-borne stem cell comes from yolk sac e microenvironment + proliferation promoting send lc to pld and lt two weeks before borne
3) Lymphoid organs a. Central lymphoid organs: thymus, bone marrow developed earlier blood-borne stem cell comes from yolk sac microenvironment → proliferation promoting send LC to PLD and LT two weeks before borne
b. Peripheral lymphoid organs: lymph node, spleen and palatine tonsil e developed later ● LC come from clo cell proliferation need antigen stimulating-antigen dependent e place for immune reactions
b. Peripheral lymphoid organs: lymph node, spleen and palatine tonsil developed later LC come from CLO cell proliferation need antigen stimulating- antigen dependent place for immune reactions