Question

why is our backbone made up of many small vertebrae instead of having one straight long bone ?​

Answer 1

Answer:

The backbone is made up of several small bone instead of a single bone because if there was a single bone when there is a high chance of damage to the bones when we make our body straight according to the posture. Also, this would hinder flexibility.

Explanation:

Hope this helps :)

Answer 2

Answer:

our backbone is made up of many small vertebrae instead of having one straight long bone to prevent lack of articulation , we would not be able to sit or crouch .