. Irritable Bowel Syndrome (IBS) is an exceeding common gastrointestinal disorder that is suspected of having a complex and multifactorial etiology and several classifiable variants (subtypes). Discussion one of the various aspects of IBS, including: classification, etiology, pathophysiology, clinical manifestations and intervention/treatment. 2.Inflammatory bowel disease (IBD) typically takes on one of two forms: Crohn’s disease or Ulcerative Colitis. Both disorders are thought to be caused by an immune response to normal intestinal bacteria, resulting in inflammation of the intestinal mucosa. While many symptoms are common to both disorders, they also display distinct differences. Research and discussion the similarities and differences of Crohn’s Disease and Ulcerative Colitis. 3.With obesity rates increasing at staggering exponential rates in the United States, bariatric surgical procedures have become increasingly common.