The cranium,which protects the brain,is made up of how many bones (in $bones$)?

Through which aperture does the spinal cord pass out of the cranium?

The skeletal system provides support and protection to body parts. Which of the following bones is distinct in its function?

Which of the following statements is correct regarding certain parts of the human skeleton?

Out of $X$ pairs of ribs in humans,only $Y$ pairs are true ribs. Select the option that correctly represents the values of $X$ and $Y$ and provides their explanation.

In birds,some of the vertebrae are fused to form: