Long Bone and Osteon

Front

What is an osteon?

Back

An osteon, also known as a Haversian system, is the fundamental functional unit of compact bone, consisting of a central canal surrounded by concentric rings of bone matrix.

Front

What is the diaphysis of a long bone?

Back

The diaphysis is the long, tubular shaft of a long bone, which provides strength and support.

Front

What are lamellae?

Back

Lamellae are thin layers of bone matrix that form the concentric rings around the central canal in an osteon.

Front

What are canaliculi?

Back

Canaliculi are small channels that connect lacunae and allow for communication and nutrient exchange between osteocytes.

Front

What is the epiphysis of a long bone?

Back

The epiphysis is the end part of a long bone, which is typically wider than the shaft and is involved in joint formation.

Front

What is the function of osteocytes?

Back

Osteocytes are mature bone cells that maintain bone tissue and communicate with other bone cells through canaliculi.

Front

What is the periosteum?

Back

The periosteum is a dense layer of vascular connective tissue that covers the outer surface of bones, except at the surfaces of the joints.

Front

What is the medullary cavity?

Back

The medullary cavity is the central cavity of a long bone where bone marrow is stored.

Front

What are osteoblasts?

Back

Osteoblasts are bone-forming cells that synthesize and secrete the bone matrix.

Front

What is the role of Volkmann's canals?

Back

Volkmann's canals are channels in bone that transmit blood vessels from the periosteum into the bone and communicate with Haversian canals.