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What is the rod (such as a backbone) that extends down the length of the body for support called?

The notochord is a cartilaginous skeletal rod that supports the body in all embryonic and some adult chordate animals.
What is the rod (such as a backbone) that extends down the length of the body for support called?
09
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What is the rod (such as a backbone) that extends down the length of the body for support called?
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