4. Development of secondary marrow cavity two regions form at the epiphuses much like occurred along the diaphysis; one secondary marrow cavity typically forms faster than the other. 5. Epiphyseal Plate of infant/child epiphyses of bone are made up of hengur comcellous bone, except at the extreme ends of the bone where a lining of which is a plate of retained hyaline cartilage responsible for continued longitudinal growth of the bone. 6. Adult bone full transition occurs in late to early (look it up!) when all remaining cartilage of the transitions to bone and the plate is now referred to as the .