Attn outside of the context of a letter is simply slang for the word attention.. The abbreviation is often used in non-professional internet communications or works of literature that purposefully subvert traditional grammar.
As a result, lymphatic fluid may accumulate in the skin, producing swelling that can be uncomfortable or, in some cases, debilitating. The main function of the lymph nodes is filtering the lymphatic fluid, thus trapping viruses, bacteria and other foreign materials that could be found in lymph fluids.
The lymphatic system is composed of lymph vessels, lymph nodes, and organs. The functions of this system include the absorbtion of excess fluid and its return to the blood stream, absorption of fat (in the villi of the small intestine) and the immune system function.ome lymphocytes migrate to the thymus and become T cells that circulate in the blood and are associated with the lymph nodes and spleen. B cells remain in the bone marrow and develop before moving into the circulatory and lymph systems. B cells produce antibodies. Macrophage Attacking E.coli (SEM x8,800).