Answer: Exoskeleton
Explanation: The word prefix begins with a prefix. PRE- means “before, or in front of.” The root FIX means “attach, or fasten.” Thus, a prefix is attached in front of something. Not every medical term begins with a prefix, but if a prefix is there, it will always be at the beginning of the word. Prefixes provide details on a specific area of an organ, or they provide information on the parts involved.