Question

Haversian canals occur in

• A. All bones
• B. Long bones
• C. Alimentary canal
• D. None of the above

Answer 1

The correct option is B Long bones

• The structural unit of a compact bone is called the osteon or Haversian system.
  
• Each Haversian system is an elongated cylinder oriented parallel to the long axis of the bone. It consists of a central Haversian canal with concentric rings(lamellae)of bone matrix running lengthwise. Haversian canal carries nerves and blood vessels to all the areas of bone.
• Haversian canal occurs in long bones.
• So, the correct answer is 'Long bones'.