Lymph nodes (mediastinum) are small round organs of the lymphatic system that support the proper functioning of the immune system. They help the body fight infection by filtering foreign lymphatic particles, a transparent or whitish fluid that consists of white blood cells. Lymphrate also contains a type of white blood cells called lymphocytes that help attack bacteria in the blood. Intra-articular lymph nodes are glands that are located in the part of the chest that lies between the breastbone and the spine. Read below mediastinum function.
This region is called mediastinum and contains the heart, thymus, trachea and large blood vessels. Mediastinal lymph nodes are responsible for bone marrow support and the thymus for the production of mature lymphocytes. Lymph nodes differ in size from the size of the head to the size of lima beans. They enclose in a fibrous capsule. The lymph nodes are connected with each other by various lymph vessels and are drainage vessels (ie away from the center or away from the central nervous system).
The mediastinum locates in the chest and is close on the right and left through the pleura. It surrounds with the chest at the front, the lungs at the sides and the spine at the back and stretches from the sternum to the front of the spine at the back and contains all the organs of the chest except the lungs. It is continuous with a loose connective tissue of the neck.
Mediastinum can be divided into upper (or upper) and lower (or worse) parts:
The mediastinal mediastinum begins at the top of the chest and ends in the plane of the chest.
The chest surface separates the upper and lower mediastinum. This is the plane at the angle of the sternum and the intervertebral disc T4-T5.
Inferior mediastinum from this level to the diaphragm. This lower part divides into three areas, all referring to the pericardium – the front part of the mediastinum located in front of the pericardium, the middle mediastinum contains the pericardium and its contents, and the posterior mediastinum is located behind the pericardium.