That interesting even the Son of man Jesus informs us his flesh profits for nothing, zero …. it was dying the first death just any other corrupted flesh .
Right from the beginning, God in respect to his faith as to the glory departed...in the twinkling of the eye corruption of mankind began.....body, spirit and soul.
Natural man not born of the Spirit of Christ will not rise on the last day and receive a new incorruptible body. There will then be no eternal punishment presently or in the future. The wrath of God. The first death is being revealed .Turn on the news.
Ecclesiastes 12:7 Then shall the dust return to the earth as it was: and the spirit shall return unto God who gave it.
In Hebrew the word for spirit is Ruach in Greek it is Pneuma. Both mean Spirit, Breath or wind. The literal meaning is Breath. All life contains Gods Spirit or Breath. So that is what returns to God. His Breath or Spirit, we do not possess a Spirit of our own. People are a physical body given life through Gods Spirit. Animals were created exactly the same as people by God in the Genesis account of creation.
When you die you go to the grave and rest there until the resurrection. The bible is consistent from beginning to end in regards to that matter.