One of the best science fictions of all time was Frankenstien. But we all know that after the body is dead everything would have to be very well preserved for it to work. But how long could cells remain alive after an organism has died? The red blood cells would go first due to lack of breathing. But in any way, what else could we do to prevent or reverse death?

Red cells (erythrocytes) would not be the first to go. Erythrocytes are not 'alive' in the cellular sense anyway; they have no nucleus. Only erythroblasts (immature red cell precursors) have nuclei.

 

Neurons are the most sensitive to anoxia and they die first (they start dying after 2-4 minutes).