HI310 Lecture Notes - Lecture 6: Haversian Canal, Medullary Cavity, Bone
24 Jan 2019
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To serve as a firm framework for the entire. What is the name of the two irregular ends of the. What are the two types of bone membranes? body. To protect such delicate structures as the brain and spinal cord. To serve as levers, working with attached muscles to produce movement. To serve as a storehouse for calcium salts, which may be reabsorbed into the blood if there is not enough calcium. To produce blood cells (in the red marrow) The first type is compact bone; the cells in this type are located in rings around a central haversian canal. Each ring-like unit with its central canal is called a haversian system, or osteon. Forming a channel from one side to the other are many perforating canals, which house blood vessels and nerves. The second type is called spongy or cancellous bone. It has more spaces and is made of a meshwork of small, bony plates willed with red marrow.
