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==Spleen Structure Cartoon==
==Spleen Structure Cartoon==


Schematic representation of the organization of the spleen (left panel).
* '''White pulp''' - consists of T cell zones (also known as the periarteriolar lymphoid sheath (PALS)) containing networks of fibroblastic reticular cells (FRC) surrounding a central arteriole, together with B cell follicles containing a central network of follicular dendritic cells (FDC).  
 
** Immune cells enter the white pulp at regions where the T cell zones abut the MZ, known as the MZ bridging channels.
* The white pulp consists of T cell zones (also known as the periarteriolar lymphoid sheath (PALS)) containing networks of fibroblastic reticular cells (FRC) surrounding a central arteriole, together with B cell follicles containing a central network of follicular dendritic cells (FDC).  
* '''Marginal zones''' - (MZ) surrounding the white pulp contain marginal reticular cells (MRC), particularly at the edges of the B cell follicles.  
* Marginal zones (MZ) surrounding the white pulp contain marginal reticular cells (MRC), particularly at the edges of the B cell follicles.  
* '''Central arteriole''' - Blood and leukocytes entering the spleen pass through branches of the central arteriole, which end in the marginal sinuses and red pulp.  
* Blood and leukocytes entering the spleen pass through branches of the central arteriole, which end in the marginal sinuses and red pulp.  
* '''Red pulp''' - In the cords of the red pulp, a dense network of reticular fibroblasts and fibres construct an open blood network, which is marked by its lack of a typical endothelial cell lining.  
* In the cords of the red pulp, a dense network of reticular fibroblasts and fibres construct an open blood network, which is marked by its lack of a typical endothelial cell lining.  
** Large numbers of macrophages phagocytose dying or damaged red blood cells in the red pulp (not shown).  
* Large numbers of macrophages phagocytose dying or damaged red blood cells in the red pulp (not shown).
* Immune cells enter the white pulp at regions where the T cell zones abut the MZ, known as the MZ bridging channels.  


===Reference===
===Reference===

Revision as of 19:01, 22 February 2012

Spleen Structure Cartoon

  • White pulp - consists of T cell zones (also known as the periarteriolar lymphoid sheath (PALS)) containing networks of fibroblastic reticular cells (FRC) surrounding a central arteriole, together with B cell follicles containing a central network of follicular dendritic cells (FDC).
    • Immune cells enter the white pulp at regions where the T cell zones abut the MZ, known as the MZ bridging channels.
  • Marginal zones - (MZ) surrounding the white pulp contain marginal reticular cells (MRC), particularly at the edges of the B cell follicles.
  • Central arteriole - Blood and leukocytes entering the spleen pass through branches of the central arteriole, which end in the marginal sinuses and red pulp.
  • Red pulp - In the cords of the red pulp, a dense network of reticular fibroblasts and fibres construct an open blood network, which is marked by its lack of a typical endothelial cell lining.
    • Large numbers of macrophages phagocytose dying or damaged red blood cells in the red pulp (not shown).

Reference

<pubmed>19644499</pubmed>| PMC2785037 | Nat Rev Immunol.

Mueller

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