Which statement correctly describes canaliculi?

• A. They are bone-forming cells
• B. They are channels that connect lacunae and allow exchange
• C. They are channels that connect lacunae and allow exchange
• D. They are tiny channels that connect lacunae and allow nutrient exchange

Answer: (D)

Canaliculi are tiny channels in bone tissue that connect lacunae. They house the extensions of osteocytes and enable direct communication through gap junctions, allowing nutrients, wastes, and signaling molecules to move between neighboring cells. This network keeps bone cells nourished and coordinated despite being embedded in a mineralized matrix. So, the best description is a small channel that links lacunae and facilitates nutrient exchange. It’s not a bone-forming cell itself (that would be an osteoblast), but a connective passageway that supports cellular exchange.