The Skull
It is made up of many bones joined together to form the cranium.
The cranium encloses and protects the brain.
The cranium has perforations to allow blood vessels and nerves to pass to and from the brain.
The facial skeletal consists of the upper and lower jaws.
The lower jaw or mandible articulates to the cranium with a moveable joint.
The cranium protects the olfactory organs, middle and inner ear and eyes.
At the posterior end of the cranium are two smooth rounded protuberances, the occipital condyles that articulate with the atlas vertebra to form a joint which permits the nodding of the head.