PLEASE SOMEONE ANSWER I WILL RATE 5
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Human backbone provides support to our body and helps in the movement. ... The vertebral units promote this movement. If back bone is made up of one long bone then we would never be able to sit, crouch or lie. One single bone means no flexibility in the structure of a bone.
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If human backbone is made up of single bone then it is not possible for us to sit or lie even we will not be able to stand.So one single bone cannot support it...
I hope it would help
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