These are blood vessels that carry blood from the medullary cavity and periosteum to the osteon and run perpendicular to the long axis of the bone.

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Volkmann canals (also known as perforating canals) run perpendicular to the long axis of the bone and carry blood vessels from the periosteum and medullary cavity into the central canals (Haversian canals) of the osteons. Lamellar canals and Sharpey's canals do not exist, and osteochondral canals are unrelated to bone structure.

These Are Blood Vessels That Carry Blood from the Medullary