Gut-associated lymphoid tissue
The gastrointestinal tract's immune system is often referred to as gut-associated lymphoid tissue or Gut-Associated Lymphatic Tissue (GALT) and works to protect the body from invasion. The GALT is an example of mucosa-associated lymphoid tissue.
The following comprise lymphoid tissue in the gut:
- Tonsils (Waldeyer's ring)
- Peyer's patches
- Lymphoid aggregates in the appendix and large intestine
- Lymphoid tissue accumulating with age in the stomach
- Small lymphoid aggregates in the esophagus
- Diffusely distributed lymphoid cells and plasma cells in the lamina propria of the gut
The digestive tract is an important component of the body's immune system. In fact, the intestine possesses the largest mass of lymphoid tissue in the human body. The GALT is made up of several types of lymphoid tissue that store immune cells, such as T and B lymphocytes, that carry out attacks and defend against pathogens.
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