Apologies for the grim and gross question, but I’m curious!
I was cooking some pasta earlier when I turned off the heat and drained the water off in the sink. As I turn back, I see a bug crawling on the cupboard above the range for a moment and then fall all the way onto the stovetop. It wriggled helplessly on its back for a few moments and then went completely still, seemingly dead within five seconds.
I know that living things can be consumed by fire and burn to a crisp, and I also know that serious burns can have long-term dangers due to things like nerves/muscles being damaged and a weakening of the immune system. But when actual fire isn’t involved and death still happens quickly, what’s happening to the body that can cause a quick death due to a burn?
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When any part of a body gets too hot it is effectively “cooked”. Perhaps it’s not the same level of “cooking” as you’d use for food, but proteins undergo chemical changes which make stop performing the functions necessary for a cell to operate. This happens at only a few degrees above normal body temperature, for example a fever of 105 F is very serious as this is close to the point of major cell damage caused by overheating.
For a small organism like an insect, it is very quickly “cooked” throughout its body and basically all body functions stop working.
For a larger organism it could be much slower, a burn may damage a vital organ (the skin is the obvious part often subject to burns) and the body can’t survive without it. Severely damaged skin for example can’t control temperature or the entrance/exit of moisture and can’t prevent the entrance of bacteria so a large area of skin being severely damaged is a huge problem for the rest of the body.
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