If you die will your brain die too?

if you die this is primary flaccidity and lose heat called death chill within minutes blood settle lowermost part of body and color is called livor mortis 3 to 6 hours muscle start to contract 24 hours to 80 hours called secondary flaccidity oxygen cannot produce removing carbon dioxide decompose enzyme eat cells we have microorganisms no more immune system gases produced insect eat it after that it become skeleton after that it decopose into mud