Spleen (Spleen, Lien)

The spleen (Spleen, Lien) is a large dark red, ovoid peripheral organ of the immune system, located in the left half of the abdominal cavity below and behind the stomach. The spleen is covered on all sides by peritoneum, which is firmly fused with its fibrous capsule. Connective tissue crossbars extend from the capsule into the organ. The splenic pulp is located in the loops of the stroma. The spleen contains white and red pulp. The white pulp is the lymphoid apparatus of the spleen located inside the red pulp, which includes periarterial lymphoid couplings, lymphoid nodules formed on the basis of these couplings, and ellipsoidal macrophage-lymphoid couplings (ellipsoids). The red pulp includes areas of the spleen parenchyma, in which there are branches

The spleen (also called the splenic or venous and sometimes called the lymph sac) is a large organ of the abdominal cavity. It is located in the upper left corner of the abdomen, posterior to the stomach and one third above the left rib, usually to the left of the midline of the body. Since it lies deep, the patient may not feel this organ until he suffers trauma to the abdominal cavity or suffers a rupture of the abdominal hematoma. In 5-7% of cases, the spleen may be the only second organ visible in the abdominal cavity on plain radiographs.

This is a very important organ that performs several important functions:

1. Blood Regulation The spleen is the main source of yolk (the embryo's most important source of nutrients) and maintains immune control in mother and baby. In adults, it functions as a filter for erythroblasts that pass through the spleen