Spleen

Spleen (splen) is the largest organ of the immune system, whose length is 12 cm, weight - 150-200, she is located in the left upper quadrant, being projected on the wide end of the chest between the ribs IX and XI, have a characteristic brownish-red hue, flattened elongated shape and a soft consistency. The spleen is fixed in position by means of phrenicolienal ligament (lig. phrenicolienale) and gastro-splenic ligament (lig. gastrolienale). On top of her covers fibrous sheath (tunica fibrosa), fused with the serous membrane (peritoneum).

The convex outer surface of the spleen is called the diaphragm (fasies diaphragmatica), as contact with the diaphragm, and a concave inner surface, called the splanchnic (fasies visceralis), addressed to the stomach, splenic flexure, the tail of the pancreas, left kidney and adrenal gland left. Departments splanchnic surfaces are called by the name of the adjacent organs. In addition, there are gates of the spleen (hilus lienis), through which penetrate into the parenchyma vessels and nerves. The surfaces are separated by blunt bottom edge (margo inferior) and a sharp upper edge (margo superior). In addition, the spleen is isolated and reversed back up the rear end (extremitas posterior) and front-end (extremitas anterior), facing forward and down.

In Fig. 242.
Spleen
1 - the rear end;
2 - the upper edge;
3 - Gate of spleen;
4 - splenic artery;
5 - splenic Vienna;
6 - bottom edge;
7 - the front end

Stroma of the body form of connective tissue bar spleen (trabeculae) (trabeculae lienis), connecting with each other and connected to the capsule, as well as the reticular tissue, consisting of reticular cells and fibers. This tissue is called the pulp of spleen (pupla lientis) and forms the splenic lymphoid follicles (folliculus lymphaticus lienalis). Spleen parenchyma are the white pulp (pulp), like the lymphoid tissue consists of lymphoid nodules and splenic lymphoid PERIARTERIAL sheaths, which are accumulations of lymphoid tissue around the artery intraorganic, and red pulp that constitutes 75-85% of the total mass of the body. Red pulp form venous sinuses, red blood cells (which explains its characteristic color), lymphocytes and other cell components. Red blood cells, finish the life cycle, are being destroyed in the spleen. In addition, it shall differentiation Wee T-lymphocytes.

In Fig. 243.
The structure of the spleen
1 - fibrous sheath;
2 - trabecula of spleen;
3 - lymphoid follicles of the spleen;
4 - venous sinuses;
5 - the white pulp;
6 - red pulp




List of Abbreviations

a., aa. — arteria, arteriae (artery, the artery)

lig., ligg. — ligamentum, ligamenta (ligament, the ligaments)

m., mm. — musculus, musculi (muscle, the muscle)

n., nn. — nervus, nervi (nerve, the nerve)

r., rr. — ramus, rami (branch)

s. — seu (or)

v., vv. — vena, venae (vienna)