bronchial-associated lymphoid tissue

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An organized collection of lymphocytes and lymphoid tissue found in the walls of the airways, where it protects the respiratory epithelium. Each of the numerous BALT aggregations comprises B and T cells, which are crucial in inducing an immune response to invading microorganisms and other inhaled antigens. BALT forms part of the network of mucosal-associated lymphoid tissue.

Subjects: Biological Sciences.

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