Question

which component of compact bone is best described as the functional unit of all of the concentric lamellae that surround a single central canal?
perforating canal
lacuna
canaliculi
osteon

Explanation:

The osteon is the functional unit of compact bone. It consists of concentric lamellae surrounding a central canal (Haversian canal). Perforating canals (Volkmann's canals) connect different osteons. Lacunae are small cavities that house osteocytes. Canaliculi are tiny channels that connect lacunae.

Answer:

D. Osteon