The cells of the adaptive immune system are special types of leukocytes, called lymphocytes. B cells and T cells are the major types of lymphocytes and are derived from hematopoietic stem cells in the bone marrow.
Abdominal pain do stomach ulcers cause gas and bloating href=http://flatulencetreatments.com/how-to-make-good-fart-sounds/>or swelling. These are fairly obvious causes of chronic cough bronchitis digestive health tonic accordingly.
1 Stomach ulcers and intestinal ulcers. 2  Ulcers in the stomach may enlarge and erode through a blood vessel, causing bleeding. 3  Aside from medication, the most common cause of a stomach ulcer is an infection with a bacterium called Helicobacter pylori.