The study of the intestines is ; the word part you chose is a

The study of the stomach and intestines and their diseases is called Gastroenterology; the word part “Gastroentero” that I chose is a combining vowel. Even if the second root begins with a vowel it is used to connect two-word roots.

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this