Final answer:
Osteons are the structural unit of compact bone, and contain lamellae and central canals.
Step-by-step explanation:
The structural unit of compact bone is called an osteon, or Haversian system. Each osteon consists of concentric rings of calcified matrix called lamellae. Running down the center of each osteon is the central canal, or Haversian canal, which contains blood vessels, nerves, and lymphatic vessels. The structural unit of compact bone is called an osteon, or Haversian system. Each osteon consists of concentric rings of calcified matrix called lamellae. Running down the center of each osteon is the central canal, or Haversian canal. These vessels and nerves branch off at right angles through a perforating canal, also known as Volkmann's canals, to extend to the periosteum and endosteum.