Answer :
Peyer's patches and the tonsils are part of the collection of small lymphoid tissues that protect the upper respiratory and digestive tract from infection and are referred to as MALT or mucosa-associated.
What are lymphoid tissues?
Organized tissues called lymphoid tissues aid immune responses. The bone marrow and the thymus are the primary lymphoid tissues and the sites of lymphocyte production. For instance, Peyer's patches, tonsils, spleen, and lymph nodes are examples of secondary lymphoid tissue.
It is made up of reticular fiber-based connective tissue that is permeated with a variety of leukocytes (white blood cells), primarily lymphocytes, through which the lymph flows. Lymphoid follicles are parts of the lymphoid follicles that are crammed full with lymphocytes.
Therefore, Peyer's patches and the tonsils are part of the collection of small lymphoid tissues that protect the upper respiratory and digestive tract from infection and are referred to as MALT or mucosa-associated.
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