A major B5-sized book, with the illustrations and diagrams. It's a deep book for insect masters and professional researchers, but it can be read by ordinary people without difficulty. "We develop a closed-blood system, and the hemoglobin, which is a respiratory pigment in the blood, carries oxygen to each tissue, and so the oxygen supply is working smoothly.". Insects have a respiratory system that can spread oxygen to the gas instead of the blood vessels of higher animals, which develop a