Answer:
The answer is Skull bone
Step-by-step explanation:
During a motor vehicle accident a head fracture can occur in the patient.
This fracture can result in what is known as Cerebral Spinal Fluid leak or brain leak, Indicating that the skull bone may have been severely damaged.
The brain is surrounded by this fluid, and only in extreme cases of trauma it will be possible to see it come out of the patient's nose.