These holes are called spiracles , each hole leads to a large tube called a trachea . The large tubes divide into small tubes, which in turn, divide into still smaller tubes that branch out to all the cells of the body. This system of tubes carries oxygen to the cells and takes away the carbon dioxide. Yes, they do. A grasshoppers blood does not flow through veins and arteries as our does.
Blood fills the whole cavity of the grasshoppers body and bathes all the organs and muscles.
The blood is circulated by a long tube that lies just under the exoskeleton of the back. This tube extends almost the entire length of the body. The pumping part of the tube lies in the abdomen, and is called heart. The front part of the tube extends into the head and is called the aorta. Blood enters the tube through little openings called ostia , along the sides.