How many number of bones are present in an adult human body?

Explanation

**Step-by-Step Solution:**

1. **Understanding Bone Count in Newborns**: A newborn baby has approximately 300 bones. This is because many of the bones are not yet fused together and are still separate.

2. **Bone Fusion During Growth**: As the baby grows into an adult, some of these bones begin to fuse together. This process reduces the total number of bones.

3. **Specific Example of Fusion**: One notable example is the vertebrae. In adults, 9 vertebrae bones fuse to form one long bone, which is part of the spine.

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