<P> The medullary cavity ( medulla , innermost part ) is the central cavity of bone shafts where red bone marrow and / or yellow bone marrow ( adipose tissue ) is stored ; hence , the medullary cavity is also known as the marrow cavity . Located in the main shaft of a long bone ( diaphysis ) ( consisting mostly of compact bone ) , the medullary cavity has walls composed of spongy bone ( cancellous bone ) and is lined with a thin , vascular membrane ( endosteum ) . However , the medullary cavity is the area inside any bone ( long , flat , etc . ) that holds the bone marrow . </P>
<P> The medullary cavity ( medulla , innermost part ) is the central cavity of bone shafts where red bone marrow and / or yellow bone marrow ( adipose tissue ) is stored ; hence , the medullary cavity is also known as the marrow cavity . Located in the main shaft of a long bone ( diaphysis ) ( consisting mostly of compact bone ) , the medullary cavity has walls composed of spongy bone ( cancellous bone ) and is lined with a thin , vascular membrane ( endosteum ) . However , the medullary cavity is the area inside any bone ( long , flat , etc . ) that holds the bone marrow . </P>
where do the medullary cavities of bone exist
where do the medullary cavities of bone exist
main shaft of a long bone
main shaft of a long bone