Biology · Skeletal System
The joint between the atlas and axis vertebrae permits rotation without flexion-extension mainly because:
- 1Articular cartilage is completely absent
- 2Ligaments restrict all movement except rotation
- 3The dens (odontoid process) of the axis acts as a pivot✓
- 4The joint lacks a synovial cavity
Correct answer
The dens (odontoid process) of the axis acts as a pivot
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