Sunkist Navel Orange (1 serving) 1  Calories: 80, Fat: 0g, Carbs: 21g, Protein: 1g. 2  Calories: 80, Fat: 0g, Carbs: 0g, Protein: 0g. 3  Calories: 100, Fat: 0g, Carbs: 21g, Protein: 1g. 4  Calories: 64, Fat: 0g, Carbs: 16g, Protein: 1g. 5  Calories: 0, Fat: 0g, Carbs: 0g, Protein: 0g. 6  Calories: 80, Fat: 0g, Carbs: 21g, Protein: 1g.
Cerebrospinal fluid (CSF) Cerebrospinal fluid (CSF), clear, colourless liquid that fills and surrounds the brain and the spinal cord and provides a mechanical barrier against shock. Formed primarily in the ventricles of the brain, the cerebrospinal fluid supports the brain and provides lubrication between surrounding bones and the brain and spinal cord. When an individual suffers a head injury, the fluid acts as a cushion, dulling the force by distributing its impact.
Protection of the Brain. The brain is protected by the bony skull and by three layers of membranes, the meninges. Between the middle and inner layer is a space filled with cerebrospinal fluid, which serves as a shock absorber. The same system of membranes and fluid protects the spinal cord.