The spleen is a hemolymph organ and belongs to the reticuloendothelial system. And The Function of Spleen in Lymphatic System. It is situated in the upper and left part of the abdomen between the fundus of the stomach and the diaphragm.
Why spleen a hemolymph organ?
During fetal life it produces erythrocyte & after birth, it produces T & B lymphocytes & belongs to the reticuloendothelial system.
2. Splenic cord is mainly composed of reticular fibers & cells (which is the framework of lymphoid tissues), macrophages, Blood (i.e. RBC & other leukocytes).
Red Pulp is like an open space cavity filled with blood.
In the Splenic cord, macrophages are present which phagocytose the damaged, expired, RBC(erythrocyte). So, the chief & important function of Spleen is to filter out the blood & scavenger of RBC(erythrocytes).
Structure enter into hilum:
Structure comes out of the hilum:
Tortuous splenic artery (the largest branch of the coeliac trunk)
Other tortuous arteries of our body:
Venous drainage :
Drain into a splenic vein then into the trunk of the portal vein.
Main Function of Spleen:
1. Filter blood by removing worn-out RBC & micro agents - (which occur around Red Pulp).
2. Produce new lymphocytes which are later transported through blood-stream to target site - (Production occurs around White Pulp).
Development of Spleen:
Develops from the thickening of the mesenchyme in the dorsal mesentery.
Splenic notch, present in the upper border of the spleen which indicates that the spleen is lobulated in development.
Clinical Anatomy :
Why during splenectomy damage to the tail of the pancreas have to be carefully avoided?
The presence of the tail of the pancreas in the splenicorenal ligaments sometimes results in its damage during splenectomy. The damaged pancreas releases enzymes that start to digest surrounding tissues with serious consequences like acute peritonitis.