Gastroenterology is a branch of medicine focused on the diagnosis and treatment of digestive system diseases. Two important diagnostic methods in this field include colonoscopy and endoscopy. Colonoscopy is a procedure used to examine the inner lining of the large intestine (colon) and rectum. This process is crucial for diagnosing conditions such as polyps, colorectal cancer, and inflammatory bowel diseases. Endoscopy, on the other hand, is used to examine the upper part of the digestive system (esophagus, stomach, and beginning of the small intestine). It is utilized in diagnosing conditions like gastroesophageal reflux disease (GERD), ulcers, and celiac disease. Both procedures are performed using minimally invasive techniques and are generally done under sedation. Going through such screenings for early diagnosis and treatment can help prevent many serious health issues.