What is the circulatory system responsible for

The circulatory system is a vast network of organs and vessels that is responsible for the flow of blood, nutrients, hormones, oxygen and other gases to and from cells.

Circulatory system contains of:

Heart, Lung, Blood Vessel (Arteries & Veins)

Responsible for: Transportations

1- Deliver Oxygen & get out Co2

2- Deliver nutrients & get out waste product

3- Deliver immune cells to infection location "Inflammatory cells, RBC's & Lymphocytes" to deal with invaded organisms by kill it.

4- Deliver Secreted Hormones to target cells

answer: 4

explanation: 8

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.