**A process which also occurs in the [[Lymph nodes - Anatomy & Physiology|lymph nodes]], [[Spleen - Anatomy & Physiology|spleen]] and [[Liver - Anatomy & Physiology#Functions|liver ]] | **A process which also occurs in the [[Lymph nodes - Anatomy & Physiology|lymph nodes]], [[Spleen - Anatomy & Physiology|spleen]] and [[Liver - Anatomy & Physiology#Functions|liver ]] |