<Tr> <Th> FMA </Th> <Td> 24041 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> The periosteum is a membrane that covers the outer surface of all bones, except at the joints of long bones . Endosteum lines the inner surface of the medullary cavity of all long bones . </P> <P> The periosteum consists of dense irregular connective tissue . It is divided into an outer "fibrous layer" and inner "cambium layer" (or "osteogenic layer"). The fibrous layer contains fibroblasts, while the cambium layer contains progenitor cells that develop into osteoblasts . These osteoblasts are responsible for increasing the width of a long bone and the overall size of the other bone types . After a bone fracture the progenitor cells develop into osteoblasts and chondroblasts, which are essential to the healing process . </P>

Where is periosteum found on the surface of a long bone
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