Which of the following structures are interconnected by Volkmann's canals?
Bone marrow and surrounding tissues
Third and fourth ventricles of the brain
Central canals and fourth ventricle
Haversian canals and lacunae
Volkmann's canals, also known as perforating canals, are a network of small channels found in compact bone. These canals run perpendicular to the long axis of the bone and connect the Haversian canals, which are larger channels that run parallel to the bone's long axis, with the lacunae.
The Haversian canals contain blood vessels, nerves, and connective tissue, while the lacunae are small spaces that house osteocytes, which are mature bone cells. The interconnectedness of Volkmann's canals, Haversian canals, and lacunae allows for the exchange of nutrients, waste products, and communication between osteocytes, contributing to the overall health and maintenance of bone tissue. Therefore, the correct answer is option 4.