Cerebrospinal fluid (CSF) is formed by capillary knots called the , which hangs inside the of the brain. Ordinarily, CSF flows from the lateral ventricles into the ventricle and then through the into the fourth ventricle. Some of the fluid continues down the of the spinal cord, but most of it circulates into the by passing through three tiny openings in the walls of the . As a rule, CSF is formed and drained back into the venous blood at the same rate. If its drainage is blocked, a condition called occurs, which results in increased pressure on the brain.

1. Choroid Plexuses

2. Ventricles

3. third

4. Cerebral Aqueduct

5. Central Canal

6. Subarachnoid space

7. Forth Ventricle

8. Hydrocephalus

Explanation:

Cerebrospinal fluid formed by capillary knots called Choroid Plexuses which is hanged inside ventricles. There are four ventricles in which CFS flows from lateral to third and from cerebral aqueduct to forth ventricle. The meninges covers spinal cord which extends more inferiority to form a sac from which cerebrospinal fluid can be withdrawn without damage to spinal chord.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.