The microscopic structural unit of compact bone is the:
AOssicle
BOculus
COctagon
DOsteon
Answer & Solution
Correct answer: D. Osteon
1. It is also called a Haversian system.
2. It is built of concentric rings.
3. That unit is the osteon.
_Source: OpenStax Anatomy and Physiology 2e, Chapter 6, Bone Tissue and the Skeletal System._
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