Can't be pressed on. If the fly's head falls off, then the nerves connecting the head to the body part are broken, so you can't take the head off and put it back on, in which case the nerves can't be connected. We can find many flies that die with their head and body separated, and it is for this reason that they die. Because flies do not have as strong regeneration ability as earthworms, and the body structure of flies is also more complex.

Species and Hazards of Flies

The biological classification of flies belongs to the order Insecta, Diptera, and Cyclostomatidae, and there are many species of them, including residential and non-residential flies, and there are not many hygiene-related residential flies. There are several common species such as house flies, market flies, big-headed golden flies, green flies and hemp flies. Flies on people, in addition to the invasion of residential and work environment harassment and a few fly species stinging and blood-sucking, mainly can spread a variety of infectious diseases, such as dysentery, typhoid fever, cholera, poliomyelitis, trachoma, tuberculosis, hepatitis B and many other pathogens.