Linked from
The 46 pages that link to Vertebral column, each with the reason it gives.
VertebrateBroader topic: It is the defining skeletal feature of most vertebrates.
ChordateBroader topic: In vertebrates, it partly replaces the notochord as the main axial support.
Axial skeletonBroader topic: It forms the central support of the axial skeleton below the skull.
SeymouriaBroader topic: Seymouria's strong vertebral column supported its weight on land.