How does the nervous system interact with all other systems

The nervous system interacts with other systems becuase your endocrine system works closely with the brain to control hormones and enzymes. Your digestive and excretory systems work with the brain in both concious and unconscious ways. HOPE I HELPED

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.