文档介绍：组织胚胎学课件 七年制英文医学班专用
中国医科大学
基础医学院
组胚—英文教学组
Chapter 10 Immune system
1. Components
1)      Cells
① Lymphocyte:
a. T-lymphocytes:
cytotoxic T cell: Tc C- kill the tumor cell, virus infective cell and foreign cell
helper T cell: Th C- promotes activity of BLC and Tc C
suppressor T cell: Ts C –regulate the function of BLC and TC
b. B-lymphocytes: e into plasma cell
c. NK cell: counteract virus infective cell and tumor cell
②Plasma cell
③antigen presenting cell:
a. dendritic cell:
Blood DC
Langerhans cell
interstitial cell
veiled cell
interdigitating cell
: mononuclear phagocytic system
④other cells:
granulated cell
mast cell
blood platelet
blood-borne stem cell
*Function:
i.      immunologic defence function
ii.     immune surveillance function
iii.    immune homeostasis
2)     Lymphoid tissue
---reticular T:
reticular cell: stellate-shaped with processes to work
reticular fiber
---lymphocytes, macrophage, plasma cell and mast cell
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:
spherical or ovoid
have clear boundaries
posed of BLC
germinal center: stained pale
* primary LN → secondary LN
3) ans
a. Central ans: thymus, bone marrow
developed earlier
blood-borne stem es from yolk sac
microenvironment → proliferation
promoting
send LC to PLD and LT two weeks before borne