Cranial cavity

... are carried through the 9th(glossopharangeal) and 10th ( vagus ) cranial nerves which are called the buffer nerves .. the significance is ... mainly by sucction blood through the negativity of the intra-thoracic cavity during inspiration . so decreasing the C.O.P 4- C.O.P is also decreased ...

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... vagus nerve has the most extensive distribution in the body of all the cranial nerves, innervating structures as diverse as the external surface ... and internal abdominal organs. The root of the nerve exits the cranial cavity via the jugular foramen. Within the foramen is the superior ganglion, ...

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You need to look at the floor of the cranial cavity from the above view. One more hint. The bone helps form the base of the cranium.

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