The diagram below shows two fused bones of a mammal.
- Identify the fused bones.
- The bone that articulates at the point labelled A.
- The structure labelled B.
- State the type of joint formed at structure B.
- Name: the structure labelled C
- State two functions of the structure named in 4 above
- Name the structure labelled D
- State what happens to the structure during childbirth.