Question

Haversian system present in the long bones contain

• A. An artery and a vein
• B. A nerve and lymphatic vessel
• C. Few osteoblast
• D. All of the above

Answer 1

Answer: (D)

All of the above

A Haversian canal is a central canal within the Haversian system, which is a network of canals inside the compact bone. Haversian canals occur in the centre of the compact bone and contain blood vessels, connective tissues, nerve fibres and lymphatic vessels. The marrow in the body of long bone is supplied by one large artery (or sometimes more), which enters the body at the nutrient foramen and perforates obliquely the compact structure. The medullary or nutrient artery is accompanied by one or two veins, which sends branches upward and downward, which ramify in the medullary membrane and give twigs to the adjoining canals.