Which of these lymphoid organs destroys bacteria before it can breach the intestinal wall and generates "memory" lymphocytes for long-term memory?

Peyers patches

Explanation:

Peyers patches are group of lymphoid follicles found in the ileum of the small intestine.

This part of lymphatic system form part of immune system that help to control bacteria population in the small intestine and prevent the growth of pathogenic bacteria in the small intestines. It plays an important role in immune surveillance where it recognises pathogenic bacteria and destroy the bacteria.

It is a lymphoid organs destroys bacteria before it can breach the intestinal wall and generates "memory" lymphocytes for long-term memory because it form the part of the immune system which help to fight infection or foreign substances in the body, also by generating lymphocytes which is a white blood cells of the immune system which generate long term memory of foreign pathogens and destroying it.

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explanation:

"a.) well–developed vascular system."