A:Types

* Gastrointestinal tract: esophagus, stomach, and duodenum (esophagogastroduodenoscopy), small intestine (enteroscopy), large intestine/colon (colonoscopy, sigmoidoscopy), bile duct, rectum (rectoscopy), and anus (anoscopy).

* Respiratory tract: Nose (rhinoscopy), lower respiratory tract (bronchoscopy).

* Ear: Otoscopy.