Question

9 which part of the microscopic bone communicates from outside of bone to the central canal and connects one central canal to another a canaliculi b lacunae c volkmanns canal d osteon

Explanation:

• Canaliculi: These are small channels that connect lacunae (where osteocytes are located) to each other and to the central canal. Their main role is in the exchange of nutrients and waste between osteocytes and the central canal, not in communication from outside the bone.
• Lacunae: These are small cavities in the bone matrix that house osteocytes (mature bone cells). They are not involved in the communication from the outside of the bone to the central canal.
• Volkmann's canal: Also known as perforating canals. They run perpendicular to the central (Haversian) canals. They communicate from the outside of the bone (periosteum) to the central canal and also connect one central canal to another. They contain blood vessels, nerves, etc.
• Osteon: It is the basic structural unit of compact bone. It consists of concentric layers (lamellae) of bone matrix around a central canal. It is a larger structural unit rather than a structure that specifically connects the outside of the bone to the central canal and central canals to each other.

Answer:

C. volkmann's canal