Thymus (thymus) does immune function, hematopoietic function and performs endocrine activity. The latter fact allows us to classify it, not only to the bodies immune system, but also to the organs of internal secretion.
In the thymus by the differentiation of stem cells of bone marrow entering the subcapsular zone of the subcortical matter. Therefore, it is a source of T lymphocytes, that is the central organ of the immune system. According to her lymph nodes and spleen are the peripheral organs.
The thymus gland is located in the upper mediastinum, Lying in front of the pericardium, the aortic arch, superior vena and brachiocephalic veins. Its front surface is in contact with the handle and the body of the sternum and the lateral surfaces of adjacent sections of lung tissue and mediastinal pleura. In the thymus isolated right and left lobe, the location of which resulted in the authority. Both shares are covered by a capsule (capsula), formed by connective tissue. From the capsule deep into the body processes diverge, divide it into small slices (lobulus thymi) and interlobular septa are called (septum interlobulare). Lobules are formed cortical substance (cortex), located on the periphery and characterized by high functional activity, and lies at the center of medulla (mebulla). K cells are thymus lymphocytes (thymocytes), macrophages, granulocytes and plasma cells. Medulla established specific layered corpuscles, consisting of flattened epithelial cells called Hassall corpuscles.
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)