NPTE Physical Therapist Exam Review

Category - Physical Therapy

What type of osseous tissue makes up the Haversian system and comprises up 80% of skeletal mass?
  1. Spongy
  2. Trabecular
  3. Cancellous
  4. Compact
Explanation
Answer: D - Compact, or cortical, bones make up the Haversian system and comprise up to 80% of skeletal mass. This type of osseous tissue is located near the outer layer of the bone, and is made up of bone cells, nerves, blood and lymph vessels.
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