Lymphatic vein Lymphatic vessel/vein - transport lymph One-way valve - prevents backflow of lymph

Lymph node histology Capsule Lymphocytes and macrophages Medullary cords with sinuses Lymphoid nodules Medulla Cortex Capsule

Spleen histology Central artery in white pulp Red pulp Red pulp White pulp White pulp Trabeculae Capsule

Thymus histology Mudulla of thymus - contains mature T-cells Mudulla of thymus - contains mature T-cells Cortex of a lobule - with actively dividing T-cells Cortex of a lobule - with actively dividing T-cells Septum - divides thymus into lobules Septum - divides thymus into lobules Capsule Capsule Thymus