Question

there are ____bones.​

Answer 1

There are 206 bones.

- The adult human skeleton is made up of 206 bones. These include the bones of the skull, spine (vertebrae), ribs, arms and legs.

- Prefer the attachment for more information. ( Souce: Góogle)

Answer 2

It can't be said that how many bones are there

You have to mention the animal and its age .

for example

A baby human has 300 bones

wheras it becomes 206 as the baby grows into adult.

A lion have 250 - 260 bones different from human.

So , in this question you may write

There are 206 bones.

Considering an adult human. This should be the standard answer when there is no mention of anything.