Levels of Aging (like Nested
Dolls)
-
Organism (human
beings)
-
System (cardiovascular,
nervous)
-
Organ (heart, brain)
-
Tissue (muscle, lung)(histology)
-
Cell (liver,
epithelial)
-
Organelle (mitochondrea,
nucleus)
-
Organic Molecule
(DNA, lipid)
-
Atom (H, O, C,
N...... are essentially immortal)
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