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.What is the main purpose of the axial skeleton?
It provides central support for the body and protects internal organs like the brain, spinal cord, and organs in the thorax..
Q: What are the three regions of the axial skeleton?
A: The skull, vertebral column (spine), and bony thorax (ribcage and sternum).
Skull Structure
Q: What type of bones make up most of the skull?
A: Flat bones that are immovably joined together, except for the mandible.
Q: What are the two sets of bones in the skull?
A: Cranial bones (form the cranium) and facial bones (form the face).
Q: How many cranial bones form the cranium?
A: Eight flat bones.
Q: What is a key characteristic of cranial bones?
A: They form a helmet-shaped structure with immovable joints called sutures.
Q: What are fontanelles, and why are they important?
A: Fontanelles are membrane-filled spaces in the cranium at birth. They allow the baby’s head to compress during birth and provide space for the brain to grow during infancy.
Q: By what age are fontanelles replaced by bone?
A: By the age of two years.
What are three functions of the cranium?
A:
1. Protects the brain.
2. Protects sense organs of smell, sight, and hearing.
3. Provides attachment for head muscles
.Q: What bone supports the soft tissue of the nose?
A: Nasal bone.
Q: Which jaw is movable, and what is it called
A: The mandible (lower jaw).
