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Hollow air filled spaces inside certain skull bones are called:

AParametric slots
BParanasal sinuses
CParanormal spaces
DParallel sockets
Answer & Solution
Correct answer: B. Paranasal sinuses
1. They lighten the skull and warm air. 2. Each is named for the bone it sits in. 3. They are the paranasal sinuses. _Source: OpenStax Anatomy and Physiology 2e, Chapter 7, Axial Skeleton._
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