C like cranium

C as in Cranium

Is a party board game or ...

the upper bony structure of the skull, including everything except for the mandible or jawbone.  The cranium protects the brain and head, and supports facial structures such as the eyes and ears, holding them in the proper place to receive sensory information most efficiently.

 Animals that have a skull are collectively known as craniates.

The cranium is not a single bone, but many.  They are joined by sutures, rather than joints, which allow for very little movement.  The human cranium consists of 21 bones and is subdivided into the neurocranium or brain case, which surrounds and protects the brain, and the splanchnocranium which supports the structures of the face. 

There are air filled spaces called sinuses in some of the bones near the nasal cavity.  These spaces reduce the weight of the skull and add resonance to the voice.

Skull fractures may occur with head injuries.  Although the skull is tough, resilient, and provides excellent protection for the brain, a severe impact or blow can result in fracture of the skull.  It may be accompanied by injury to the brain.

The brain can be affected directly by damage to the nervous system tissue and bleeding.  The brain can also be affected indirectly by blood clots that form under the skull and then compress the underlying brain tissue (subdural or epidural hematoma).

Even though we know that the cranium allows only very little movement, NIMBLE shows you some exercises for this part of the body.