<P> The outer shell of the long bone is made of cortical bone also known as compact bone . This is covered by a membrane of connective tissue called the periosteum . Beneath the cortical bone layer is a layer of spongy cancellous bone . Inside this is the medullary cavity which has an inner core of bone marrow made up of yellow marrow in the adult and red marrow in the child . </P>
<P> The outer shell of the long bone is made of cortical bone also known as compact bone . This is covered by a membrane of connective tissue called the periosteum . Beneath the cortical bone layer is a layer of spongy cancellous bone . Inside this is the medullary cavity which has an inner core of bone marrow made up of yellow marrow in the adult and red marrow in the child . </P>
in adults most bone marrow in the long bones of the extremities contains
in adults most bone marrow in the long bones of the extremities contains
yellow marrow
yellow marrow