Other passageways, known as perforating canals or Volkmann's canals, extend perpendicular to the surface. Blood vessels in these canals supple blood to osteons deeper in the bone and to tissues of the medullary cavity.
An awful lot! Bones contain bone marrow, that spongy substance that fills the bones, are essential for the production of blood cells. Actually, the red bone marrow is for red blood cells, but - if...