What is the jelly like substance inside the bone called?

How many bones are there in the skull?

  What percent of our body weight do the muscles make?

Name the joint between the skull and spine:

  Which of the following is a ball and socket joint?

Which is the largest bone in our body?

Number of bones in an adult:

Man is able to bend because of

What is enclosed inside the cranium?

What enables man to think?