the diaphysis of a long bone is composed of spongy bone
The diaphysis (/daÉªËaefÉ¨sÉ¨s/) daÉªËÃ¦fÉ¨sÉ¨s 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 it is a middle tubular part composed of compact bone which surrounds a central marrow cavity which contains red or yellow. marrowhe diaphysis (/daÉªËaefÉ¨sÉ¨s/) daÉªËÃ¦fÉ¨sÉ¨s is the main or (midsection) shaft of a long. bone