Final answer:
Crohn's disease and ulcerative colitis are both classified as inflammatory bowel diseases. They occur when the immune system attacks the digestive system, resulting in inflammation.
Step-by-step explanation:
Crohn's disease and ulcerative colitis are both classified as inflammatory bowel diseases. Unlike Crohn's disease, which can affect any part of the gastrointestinal (GI) tract, ulcerative colitis mainly affects the colon and rectum. Both conditions occur when the body's immune system attacks the digestive system, causing inflammation.