The $U-$shaped bone present at the base of the buccal cavity is:

Breast bone is also called

Which ribs are attached to the sternum?

Which of the following statements are correct with reference to the human endoskeleton?
$A$. Human skull is monocondylic.
$B$. The joint between any two adjoining vertebrae is a cartilaginous joint.
$C$. In human beings, the number of cervical vertebrae is seven.
$D$. All ribs except the last $2$ pairs are bicephalic.
$E$. The occipital bone of the skull is articulated with the atlas vertebra.
Choose the correct answer from the options given below:

Name the bones that form the cranium.

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