JetBlue was incorporated in Delaware in August 1998. JetBlue started by following Southwest's approach of offering low-cost travel, but sought to distinguish itself by its amenities, such as in-flight entertainment, TV at every seat, and Sirius XM satellite radio.
Function. Because the lumen of the gastrointestinal tract is exposed to the external environment, much of it is populated with potentially pathogenic microorganisms. Peyer's patches thus establish their importance in the immune surveillance of the intestinal lumen and in facilitating the generation of the immune response within the mucosa.
Peyer's Patches Named for the seventeenth century Swiss anatomist, Hans Conrad Peyer, Peyer's patches are a collection of large oval lymph tissues that are located in the mucus-secreting lining of the human small intestine. These lymph nodules are especially abundant in the ileum, the lowest portion of the small intestine.