Question

Which secondary lymphoid structures include bronchus-associated lymphoid tissue (BALT)?

Options

• Lymph nodes located along lymph vessels

• Structures located in the upper chest cavity

• Filtering organs in the left upper abdomen

• Components of MALT found in mucosal linings of the respiratory tract

Answer 1

BALT (Bronchus-Associated Lymphoid Tissue) is a component of MALT (Mucosa-Associated Lymphoid Tissue) specifically found in the mucosal linings of the lungs and respiratory tract. It provides localized immune defense against pathogens that may be inhaled, representing an important part of the body's mucosal immune system.