The Structure of the Immune System
Organs of the Immune System
Credit: NIAID.
Lymph Node
The lymph node contains numerous specialized structures. T cells concentrate in the paracortex, B cells in and around the germinal centers, and plasma cells in the medulla. Credit: NIAID.
Lymphatic Vessel
Immune cells and foreign particles enter the lymph nodes via incoming lymphatic vessels or the lymph nodes’ tiny blood vessels. Credit: NIAID.
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