Question

"Osteonecrosis is a disease caused by reduced blood flow to bones in the joints. In people with healthy bones, new bone is always replacing old bone. In osteonecrosis, the lack of blood causes the bone to break down faster than the body can make enough new bone." Based on this passage and your knowledge of bone, what is one way that reduced blood flow could cause osteonecrosis? A.Inadequate opening within the perforating canals B.Inadequate opening within the Haversian canal C.Inadequate nutrients delivered to the osteoclasts D.Inadequate nutrients delivered to the osteoblasts

Answer 1

The correct answer is letter B, inadequate opening within the Haversian canal causes the reduction in blood flow within the bones. 

The Haversian canal is the part of the bone that contains blood vessels and nerve cells that help the bone communicate with bone cells. Without the haversian canal's proper function the bone will become weak and prone to breakage.

Answer 2

Answer:

The correct answer is option b. Inadequate opening in the Haversian canals.

Explanation:

Haversian canals are a series of tiny tubes present in the cortical bone which is the outermost area of bone. It permits nerves and blood vessels to go through it and provide blood flow to the bones.

If there is any type of inadequate opening there in Haversian canals it may cause low blood flow in the bones.

Thus, the correct answer is option B.