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Volkmann's canals at right angles connect the osteons together.
The columns are metabolically active, and as bone is reabsorbed and created the nature and location of the cells within the osteon will change.
This makes it softer, and weaker but more flexible.
Other types of tissue found in bones include bone marrow, endosteum, periosteum, nerves, blood vessels and cartilage.Trabecular bone accounts for the remaining 20% of total bone mass but has nearly ten times the surface area of compact bone.Bone marrow, also known as myeloid tissue in red bone marrow, can be found in almost any bone that holds cancellous tissue.is the internal tissue of the skeletal bone and is an open cell porous network.Cancellous bone has a higher surface-area-to-volume ratio than cortical bone because it is less dense.