the term âalumigraphâ in an article published in the Spring, 2002, edition of. Printmaking Today (vol. 11, no. 1, pp. 28-29), to refer to a rather different process. So, I have decided in fairness to switch to the terms âfoilographâ and. âfoilographyâ instead.
Lymph vessels. Walled, valved structures that carry lymph around the body. Lymph nodes. Small bean-shaped glands that produce lymphocytes, filter harmful substances from the tissues, and contain macrophages, which are cells that digest cellular debris, pathogens and other foreign substances. Major groups of lymph nodes are located in the tonsils, adenoids, armpits, neck, groin and mediastinum.
Like the thymus, the spleen houses and aids in the maturation of immune system cells called lymphocytes. Lymphocytes are white blood cells that protect against foreign organisms that have managed to infect body cells. Lymphocytes also protect the body from itself by controlling cancerous cells. The spleen is valuable to the immune response against antigens in the blood.