The digestive tract's immune system is often referred to as<unk>  <unk>  and works to protect the body from invasion.<unk>  is an example of mucosa-associated<unk><unk> .
Gut-associated lymphoid tissue
Intestinal villus
Mesenteric glands
Lymphatic tissues
Morison's pouch
Rathke's pouch
Spleen
Buccal mucosa