Long bone diagram
Long Bone Diagram
The outside layer of your bones is called 'compact bone' and is hard and tough. Some bones, like your thigh bone, have spongy bone inside. The Hollow in the centre is filled with marrow.
The outside layer of your bones is called 'compact bone' and is hard and tough. Some bones, like your thigh bone, have spongy bone inside. The Hollow in the centre is filled with marrow.