The document describes the stages of the cell cycle: interphase where cells mature and chromosomes copy, followed by prophase where the nuclear membrane disappears and spindle fibers form. Metaphase has chromosomes lining up in the middle with spindle fibers attaching to each pair. Anaphase splits the chromosome pairs as fibers pull them apart. Telophase forms two new nuclei and cell membrane pinches off two daughter cells in cytokinesis.