Spinal cord or spinal medulla, which occupies upper two-thirds of the vertebral canal, and contains many reflex centers. Cerebrospinal nervous system is the somatic component of the peripheral nervous system, which includes 12 pairs of cranial nerves and 31pairs of spinal nerves. It innervates the somatic structures of the head and neck, limbs and body wall, and mediates somatic sensory and motor functions.
The cost of tolls on the new Grand Parkway will depend on the type of vehicle and where a driver gets on and off the toll road. For drivers of two-axle vehicles, a one-way trip between I-10 and US 290 will cost $2.88.
Because the Grand Canyon is a national park, be aware that there is an entrance fee. For private vehicles, the fee is $25 per vehicle. You can also enter on foot, by bicycle, by motorcycle or by free shuttle from nearby Tusayan and pay a $12 entrance fee per person.