{"id":211528,"date":"2025-05-04T08:37:03","date_gmt":"2025-05-04T08:37:03","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=211528"},"modified":"2025-05-04T08:37:05","modified_gmt":"2025-05-04T08:37:05","slug":"which-of-the-following-structures-routes-blood-from-the-periosteum-to-the-central-canal-of-each-osteon","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/04\/which-of-the-following-structures-routes-blood-from-the-periosteum-to-the-central-canal-of-each-osteon\/","title":{"rendered":"Which of the following structures routes blood from the periosteum to the central canal of each osteon"},"content":{"rendered":"\n

Which of the following structures routes blood from the periosteum to the central canal of each osteon?<\/p>\n\n\n\n

a. canaliculi <\/p>\n\n\n\n

b. endosteum <\/p>\n\n\n\n

c. osteocytes <\/p>\n\n\n\n

(d) perforating canals<\/p>\n\n\n\n

The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n

Correct Answer: (d) Perforating canals<\/strong><\/p>\n\n\n\n

Explanation:<\/strong><\/p>\n\n\n\n

Bone is a dynamic tissue that requires a constant supply of nutrients and oxygen, which is delivered through a well-organized system of blood vessels. One of the essential structures that support this vascular system in compact bone is the perforating canals<\/strong>, also known as Volkmann’s canals<\/strong>.<\/p>\n\n\n\n

The periosteum<\/strong> is a dense, fibrous membrane covering the outer surface of bones (except at the joints). It contains blood vessels, lymphatic vessels, and nerves that nourish and support bone tissue. However, for the nutrients and oxygen in these vessels to reach the central canals (Haversian canals)<\/strong> located in the middle of each osteon<\/strong> (the functional unit of compact bone), the body uses specialized channels\u2014perforating canals<\/strong>.<\/p>\n\n\n\n

Perforating canals run perpendicular (or oblique) to the long axis of the bone and connect the blood and nerve supply from the periosteum to the central canals and medullary cavity. These canals pass through the compact bone matrix, allowing for efficient nutrient and waste exchange between the bone surface and its deeper structures. Once inside the bone, the blood flows into the central canals, which run longitudinally through the osteons, supplying the osteocytes (bone cells) housed in lacunae<\/strong>.<\/p>\n\n\n\n

Other choices:<\/p>\n\n\n\n