spongy tissue inside bones which produces all blood cells including B cells and T cells

located in the upper chest behind the sternum. It is where T Cells travel form the bone marrow to mature

Bean shaped glands that monitor and cleanse lymph

Largest lymphatic organ located on the left side under your rib and above the stomach. It filters blood instead of lymph, removing old or damaged red blood cells.

Clusters of lymphatic tissue at the back of the throat. They act as the first line of defense by trapping bacteria and viruses that are breathed in or swallowed.

Moist mucous membranes that line the internal passageways and organs exposed to the outside environment