aging process. telomeres shorten, and cell division stops

adult age aging anatomy anti beautiful beauty biology biotechnology cancer cell cells centromere chromatid chromatin chromosome chromosomes cycle damage death design diagram different division dna dying evolution female gene genes genetic genome health healthy helix heredic human illustration limit medical medicine molecule nucleus old people process protein rejuvenation research science scientific senescent shorten shortening skin stop structure telomerase telomere telomeres telomeric telomers time vector woman wrinkles young