The canal that runs through the core of each osteon (Haversian system) contains ________.
A) cartilage and lamellae
B) osteoclasts and osteoblasts
C) yellow marrow and perforating, or Sharpey's, fibers
D) blood vessels and nerve fibers
E) red marrow

Question

Quizplus · Accepted Answer

The canal that runs through the core of each osteon or Haversian system contains blood vessels and nerve fibers. This canal is called the Haversian canal and it is surrounded by concentric rings of bone tissue called lamellae. Option A is incorrect because cartilage is not found in the osteon. Option B is incorrect because osteoclasts and osteoblasts are bone cells and are not found in the canal, but instead in the surrounding bone tissue. Option C is incorrect because yellow marrow and Sharpey's fibers are not found in the Haversian canal, but instead in the periosteum (outer layer of bone) and at the attachment of tendons and ligaments, respectively. Option E is incorrect because red marrow is not found in the Haversian canal, but instead in bones with spongy (cancellous) bone tissue.

The Canal That Runs Through the Core of Each Osteon