Which structure is the central channel through an osteon that contains blood vessels and nerves?

Which structure is the central channel through an osteon that contains blood vessels and nerves?

• A. Central canal
• B. Perforating canal
• C. Canaliculi
• D. Lacunae

Answer: (A)

The central canal is the main vertical channel through the osteon that houses blood vessels and nerves, providing the essential supply and innervation for the bone tissue. Around this canal, osteons have concentric lamellae with osteocytes nestled in lacunae and extending processes through canaliculi to share nutrients with the central canal. Perforating canals connect neighboring osteons and carry vessels between central canals, but they are not the single central channel of one osteon. Canaliculi are the tiny pathways linking lacunae and enabling nutrient exchange, not the main vessels themselves. Lacunae are the small chambers that house osteocytes.

The central canal is the main vertical channel through the osteon that houses blood vessels and nerves, providing the essential supply and innervation for the bone tissue. Around this canal, osteons have concentric lamellae with osteocytes nestled in lacunae and extending processes through canaliculi to share nutrients with the central canal. Perforating canals connect neighboring osteons and carry vessels between central canals, but they are not the single central channel of one osteon. Canaliculi are the tiny pathways linking lacunae and enabling nutrient exchange, not the main vessels themselves. Lacunae are the small chambers that house osteocytes.