The subunit of compact bone is the _____ . It consists of rings of bone matrix called ______that surround a structure called the______ that contains blood vessels and nerves. Other structures called _______also contain blood vessels and nerves. Osteocytes are housed in_____and communicate via_______.

Verified step by step guidance

1. Identify the subunit of compact bone, which is the structural and functional unit of compact bone tissue. This is known as the osteon (or Haversian system).
2. Understand that the osteon consists of concentric rings of bone matrix called lamellae. These rings are arranged around a central canal.
3. Recognize that the central canal (Haversian canal) is the structure within the osteon that contains blood vessels and nerves, providing nutrients and communication to the bone cells.
4. Note that other structures, called perforating canals (Volkmann's canals), also contain blood vessels and nerves. These canals run perpendicular to the central canals and connect them, facilitating communication between osteons.
5. Learn that osteocytes, the mature bone cells, are housed in small spaces called lacunae. These osteocytes communicate with each other and exchange nutrients and waste through tiny channels called canaliculi, which connect the lacunae to each other and to the central canal.

Key Concepts

Osteon

The osteon, or Haversian system, is the fundamental structural unit of compact bone. It consists of concentric rings of bone matrix, known as lamellae, which surround a central canal that contains blood vessels and nerves. This organization allows for efficient nutrient delivery and waste removal, essential for bone health.

Lamellae

Lamellae are the thin layers of bone matrix that form the concentric rings of an osteon. Each lamella is composed of collagen fibers and mineralized matrix, providing strength and resilience to the bone. The arrangement of lamellae contributes to the overall structural integrity of compact bone.

Canaliculi

Canaliculi are tiny channels that connect osteocytes, the mature bone cells, within the bone matrix. These channels allow for the exchange of nutrients and waste products between osteocytes and the central canal, facilitating communication and maintaining bone health. Osteocytes extend their dendritic processes through canaliculi to form a network that supports cellular communication.