Answer: nerve fibers and blood vessels
Explanation: The haversian canal also called the canal of havers can be described as a series of microscopic tubes or channels which provides travel passage for blood vessels and nerves. The haversian is located in the outermost region of the bone called the cortical bone with each haversian canal containing one or two capillaries and nerve Fibre with the little spaces being occupied by fat and neurovascular tissues.
