Aging or the overall deteriorating change of function can be at the cellular level as well as the whole organism level. Cellular aging or senescence underlies organismal aging.
altered regulatory pathway +
cell death pathway +
cellular detoxification pathway +
cellular trafficking cycle pathway +
homeostasis pathway +
immune response pathway +
pathway pertinent to DNA replication and repair, cell cycle, maintenance of genomic integrity, RNA and protein biosynthesis +
pathway pertinent to protein folding, sorting, modification, translocation and degradation +