Question

Haversian canal are located in

• A. Cancellous bone in human
• B. Compact bone in mammals
• C. All vertebrated bones
• D. Both A and B

Answer 1

Answer: (B)

Compact bone in mammals

• In compact bone, osteocytes are located in concentric layers around a Haversian canal, forming the basic unit called as osteon. In spongy bone, lamellae is not in the form of osteons.
• The Haversian canals contain branches of blood vessels, lymph vessels and nerves in the areolar tissue which provide nutrition and oxygen to osteocytes.
  

So, the correct option is 'compact bone in mammals'.