Question

Skull bones are

• A. Replacing bones
• B. Investing bones
• C. Sesamoid bones
• D. Irregular bones

Answer 1

The correct option is A Replacing bones

• The skull is composed of two sets of bones. They are cranial (8) and facial(14), that totals to 22 bones.
• The craniotomy is a surgery to cut a bony opening in the skull.
• A section of the skull, called a bone flap, is removed to access the brain underneath.
  
• The bone flap is usually replaced at the end of the procedure with tiny plates and screws.
• Hence skull bones are replacing bones.
• So, the correct answer is 'Replacing bones'.