The diaphysis is the main or midsection (shaft) of a long bone. It is made up of cortical bone and usually contains bone marrow and adipose tissue (fat).

Where is the diaphysis located on a long bone? OK. Let's think. My stream of consciousness:
To answer this question, we should know that: The diaphysis is the main or midsection (shaft) of a long bone. The answer is the main or midsection ( shaft ).