Being buried in a sealed cave that was carved into a rock, I believe can be classified as being in the bowels of the earth. And yes, his body was dead, but not his invisible mind=spirit was still alive, for it is written, "Being dead in the flesh but alive in spirit, he descended (Through time)
and preached the Good News to those who were disobedient in the days when Noah was building the ark."
And Jesus was laid in the cave late on Wednesday afternoon, just as the sun was setting on the 14th day of Nisan, and the night which was the first 12 hours of the 15th day of the month, was descending.
His body remained in the sealed cave, all Thursday night and Thursday, all Friday night and the following 12 hours of Friday. then Saturday night and Saturday, and was risen just as Sunday night was descending, and when the women came in the 'DARKNESS
' of Sunday morning, his body was already gone.
Three nights and three days.