The soul cannot be eaten or destroyed or mutilated. Death is the seperation of the soul from the body where the soul will begin its ascent through the heavens. As Christ taught, 'fear not he who can kill the body but cannot kill the soul.' Our bodies will be reconstituted in a transfigured state. The vision of Ezekial 37 where he saw a great open pit of bones, God responds by saying, "And I will lay sinews upon you and will bring up flesh upon you, and cover you with skin, and put breath in you, and ye shall live and shall know I am the Lord your God."
The prophecies speak of coming forth from the graves which is basically the earth, in other places such as 1Thess and in Jude (which mentions the prophecy of Enoch), those saints who are asleep will already be ressurected and will arrive with Christ in the second coming. Or perhaps their bodies will regenerate over their souls in the air(1 Thess 4.14-17) .
The parables also mention wheat and grain, that our current bodies is just a seedling. St Paul said, "But someone will say, How are the dead raised? And with what body do they come? Foolish one what you sow is not made alive unless it dies. And what you sow you do not sow that body that shall be, but mere grain, perhaps wheat or some other grain. But God gives it a body as He pleases, and to each seed its own body."(1cor 15.35)
So no, we will not come out of animals, nor will the insects go into reverse mode uneating us or anything like that.