Observe the diagram and answer the following question:

Diagrammatic representation of Lymphatic system.

What is the full form of MALT ?

Mucosa Associated Lymphoid Tissue

The correct answer is Option (4) -Mucosa Associated Lymphoid Tissue

Lymphoid organs: These are the organs where origin and/or maturation and proliferation of lymphocytes occur. The primary lymphoid organs are bone marrow and thymus where immature lymphocytes differentiate into antigen-sensitive lymphocytes.

There is lymphoid tissue also located within the lining of the major tracts (respiratory, digestive and urogenital tracts) called mucosa- associated lymphoid tissue (MALT). It constitutes about 50 per cent of the lymphoid tissue in human body.