The main theme of the poem is the regret and sorrow the narrator feels about the end of his relationship with the woman in the poem, described only as "you." The poem suggests that the woman may well have been the one to break off the affair: Pale grew thy cheek and col
Epithelial, Connective, Muscular, and Nervous
When the telomere becomes too short, the chromosome reaches a 'critical length' and can no longer be replicated.
