Chapter 63 63．Why do cockroaches always turn their legs upside down when they die?

Q Ella not Elle ask My 8-year-old brother suddenly asked me one day: "Why do cockroaches die on their backs?" I thought about it, and it seemed that this was the case except for the ones I trampled to death. Why? A technology writer minus two answers Ella is not Elle The first reason is that in terms of body structure, the back is heavy and the belly is light: most animals' bodies are arranged for defense or protection or the bones are on the back, and weaker groups such as muscles are on the abdomen, so the back is heavier.And when the cockroach is dying, this muscle is unable to support the heavier dorsal mass.And also because a dead (or dying) insect loses control of its three pairs of gastropods and can no longer keep its center of gravity below the abdomen—just as it is impossible for a human to remain standing when dead.Second, the part where the base of the insect's legs are connected to the trunk is radially gathered together, and there is a trunk restraint at the top. In such a structure, if the legs are in a completely relaxed state, the roots should be perpendicular to the trunk.In such a state, the six legs are adducted, and to make the six legs open and form an acute angle with the torso requires the strength of the legs. The former is the dead state of the insect, and the latter is the state of the insect when it is alive. state.If the six legs are adducted, the insect will not be able to keep the center of gravity below the abdomen, and it will roll over. However, due to the adjustment of the center of gravity of the torso itself, the insect will turn 90 degrees after rollover, turning the abdomen upward.The third is because of the unique respiratory system of cockroaches.It relies on abdominal breathing, so most insecticides work by blocking the pores through which the cockroach breathes, causing it to suffocate.Visible, dish soap is also enough to kill cockroaches, if you will.