Plasma cells occur in the brain.

Bodies immune system are located throughout the body.

They are called lymphoid organs because they are home to lymphocytes, small white bloodcells, which are key players in the immune system. Bone marrow, soft tissue in the hollow center of bones is the main source of all blood cells including lymphocytes. Thymus is a lymphoid organ that lies behind the breastbone. Lymphocytes known as T lymphocytes or T cells (BЂњTBЂ "stands for BЂњthymusBЂ") maturing in the thymus, then to other tissues. B-lymphocytes, also known as B cells, activated and mature into plasma cells that make and release antibodies. Lymph nodes that are in many parts of the body that lymphoid tissues that contain a large number of specialized structures. T cells from the thymus concentrate in the paracortex. B lasix 6 mg cells developing in and around germinal centers. Plasma cells occur in the brain. Lymphocytes can travel throughout the body through blood vessels. The cells can also pass through the lymph vessels, closely parallel bodyBЂ ™ with veins and arteries. Cells and fluids are exchanged between blood and lymph vessels, which allows the lymphatic system to monitor the body for invading microbes. Lymph vessels carry lymph, a clear liquid that washes bodyBЂ ™ s tissues. Small bobovidnye lymph nodes are penetrated by lymphatic vessels, with clusters in the neck, armpits, abdomen and groin. Each lymph node contains specialized department, where immune cells gather and where they can encounter antigens. Immune cells, microbes and foreign antigens enter lymph nodes via incoming lymphatic vessels or lymph nodesBЂ ™ tiny blood vessels. All lymphocytes exit lymph nodes through lymphatic vessels weekend. Once in the bloodstream, lymphocytes are transported to tissues throughout the body. They patrol all foreign antigens, then gradually drift back into the lymphatic system to start the cycle again. The spleen is a flat body in upper left abdomen. As in lymph nodes, spleen contains specialized department, where immune cells gather and work. The spleen is a meeting ground where immune confront antigens. Other clusters of lymphoid tissue found in many parts of the body, especially in the folds of the gastrointestinal tract, respiratory tract, and lungsBЂ "areas, which serve as gateways to the body. These tissues include the tonsils, adenoids, and applications. .