Question

Haversian system is diagnostic feature of :

• A. Avian bones
• B. Reptilian bones
• C. Mammalian bones
• D. Bone of all animals

Answer 1

The correct option is C Mammalian bones

Haversian system (osteon) refers to the basic cylindrical-shaped structural unit of a compact bone, which in turn forms a substantial part of the structure of the long bones of the human body.

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 is found in the long bones of the mammals like humerus, femur, etc.

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 system is a diagnostic feature of mammalian bones. So, the correct answer is 'Mammalian bones'.