flesh: the meat of a living body, whether the food it provides or one's own physical frame
At its center this word means flesh in the plainest physical sense: the soft meat of a body. Scripture uses it two ways.
First, flesh as food, the meat set before someone or torn from them. The wilderness generation doubts that God can spread a table of meat in the desert, and Micah pictures corrupt leaders devouring the very flesh of the people they should be protecting.
Second, one's own flesh, the body itself. It is what wastes away in old age, collapses under grief, or fails at death, set over against the inner strength a person still has when the body gives out.
What ties the two shades together is that this is the perishable, tangible stuff a creature is made of, the part that can be eaten or worn out, as distinct from the inner life.