adenoids adenoids are lumpy clusters of spongy tissue that sit high on each side of the throat behind the nose and the roof of the mouth. Like tonsils, adenoids help keep your body healthy by trapping harmful bacteria and viruses that you breathe in or swallow. Adenoids also contain cells that make antibodies to help your body fight infections. lymph fluid from that moves around through body tissues - composed of water, nutrients, white blood cells and proteins. Lymphatic capillaries drain into large veins near the heart. lymph nodes bean-shaped structures throughout the body that filter out microorganisms and foreign materials that have been consumed by lymphocytes. lymphatic system system that collects fluid from body tissue spaces and returns it to the blood through a system of lymph capillaries and larger lymph vessels. lymphocyte a type of white blood cell. spleen largest organ of the lymphatic system. Filters out worn or damaged red blood cells and destroys bacteria and other foreign substances. thymus gland gland that is located behind the sternum (breastbone) and produces lymphocytes that travel to other lymph organs. tonsils organs in the back of the throat that provide protection to the mouth and nose against pathogens.