Pediatrics is the branch of medicine dealing with children and is practiced by a Pediatrician. A Obstetrician is a physician specializing in obstetrics. A Internist practices internal medicine. A Immunologist studies the immune system. A immunologist that specializes in the treatment of allergies is called an Allergist.
Oncology is the study of cancer.
A Onco logist is a physician specializing in the detection and treatment of cancer. Gastroenterology is the study of the stomach and intestines and is practiced by a Gastro entero logist. Medical Terminology Associated with Dentistry. Odonto is the root word for teeth. Orthodontics is the dental branch dealing with tooth alignment and braces.