In ancient Egyptian mummies, the heart was the only organ that stayed in the body. This was because the heart would be weighed against the feather of Ma'at in the Hall of Two Truths.
The Romano-Egyptian portrait mummy of Herakleides (50 - 100 A.D.) represents a break with tradition; the lungs were left inside the body1 instead of the heart. Why is that? What use would Herakleides have for his lungs in the afterlife?