Lymphatic

• Primary lymphatic organs are where lymphocytes are formed and mature.
• Secondary lymphoid tissues are arranged as a series of filters monitoring the contents of the extracellular fluid, and also activation of lymphocytes.
• Lymphadenopathy is swelling of the lymph nodes.
• Spleen removes any old or damaged red blood cell, and controls amount of WBCs, Platelets, and RBCs.
• Lymph Edema is Elephantiasis.
• Lymph nodes filter and trap pathogens.
• Lymphatic system contributes to absorption and transport of fats a.
• In 24 hrs lymphatics return fluid equivalent to entire blood volume.
• If lymphatic system becomes blocked the person will have edema.
• Lymphatic system returns large molecules to blood.
• Special lymphatic capillaries (lacteals) in villi of small intestine absorb all lipids and fat soluble vitamins from digested food, bypasses liver, much goes straight to adipose tissues.
• Some WBCs (lymphocytes, monocytes) are made in lymphatic tissues, not bone marrow, and lymphatic system is the main supply of lymphocytes.
• Lymphoid tissue is an important component of the Immune System, forms a diffuse surveillance defense system in all body tissues and organs, and the major role of WBCs is in body defense.
• Lymphatic system screens body fluids and removes pathogens and damaged cells.
• Lymphatic Capillaries originate in tissues as tiny blind ended sacs.
• Non-Hodgkin Lymphoma is a lymphoma similar to Hodgkin Disease but more common and has a higher mortality rate.
• Lymphatic trunks merge together to form two major Lymphatic Ducts equivalent to major vessels of circulatory system but more like veins than arteries.
• Lymph nodes, also called lymph glands and oval, vary in size from pinhead to lima bean and are the most numerous of the lymphatic organs (100’s).
• The thymus is extremely important in early life, is the largest during puberty, and gets smaller with age, setting up the immune system and releasing a hormone which turns B cells into plasma cells.
• Lymphatic vessels are located alongside blood capillaries, have a single layer of endothelial cells like blood capillaries but are much more permeable to solvents, large solutes and whole cells.
• The spleen is the largest lymphatic organ, with a network of interlacing fibers, and is responsible for making monocytes and lymphocytes, and salvaging oxygen from RBC.
• The circulation of the lymph involves interstitial fluid, lymph, lymph capillary, afferent lymph vessel, lymph node, efferent lymph vessel, lymph trunk, lymph duct, Right lymphatic duct and Thoracic duct (left side), Subclavian vein (right and left), blood, interstitial fluid.
• Lymphatic vessels have three layers, are one way valves, have lymph nodes along their course, and as they converge they become larger and larger and become lymphatic trunks.
• Tonsils are masses of lymphatic tissue that lead pathogens in order to trap and kill them, and also contain food debris, bacteria, dead food cells, etc.
• Hodgkin Disease is a lymph node malignancy with early symptoms of enlarged, painful nodes, especially in the neck; fever, anorexia, weight loss, night sweats, and severe itching often progresses to neighboring lymph nodes.
• Lymphatic vessels merge with each other to form lymphatic vessels.