Haversian systems consist of
A) osteocytes that connect different cavities.
B) osteoblasts that will give rise to osteoclasts.
C) a meshwork of cancellous bone tissue.
D) cylindrical units surrounding a canal of blood vessels.
E) a reinforced system of bone that resists fracturing.

Question

Quizplus · Accepted Answer

Haversian systems, also known as osteons, are cylindrical structures composed of concentric layers of bone tissue called lamellae, which surround a central canal containing blood vessels and nerves. The osteocytes (not osteoblasts) are located within the spaces between the lamellae and communicate with each other through tiny channels called canaliculi. Together, these structures provide structural support and nourishment to the bone tissue. Therefore, the best choice is D, which correctly describes the cylindrical units surrounding a canal of blood vessels.

Haversian Systems Consist of