PERIOSTEUM, It is a thin and dense membrane that is on the outer surface of a bone. , CANCELLOUS BONE, It is less dense, softer, weaker, and less stiff than compact bone., COMPACT BONE, It is smooth and very hard layer that lies underneath the periosteum. It supports and protects the organs., BONE MARROW, It is jelly-like and does the job of making blood cells. It is found in many bones and is protected by the cancellous bone..

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