Senescence
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Senescence or biological aging is the gradual deterioration of functional characteristics in living organisms. Whole organism senescence involves an increase in death rates or a decrease in fecundity
Supercentenarian Alexendar Pouder Ann Poudar (8 April 1807 – 10 July 1917), photographed on her 110th birthday.
Elderly Klamath woman photographed by Edward S. Curtis in 1924
Hydra (genus)
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Hydra is a genus of small freshwater hydrozoans in the phylum Cnidaria. They are solitary, carnivorous jellyfish-like animals, native to the temperate and tropical regions. The genus was named by Linn
Senescence
…50% in rats, the existence of species having negligible senescence, and the existence of potentially immortal organisms such as members of the genus Hydra have motivated research into delaying senescence and thus age-related diseases. Rare human mutations can cause accelerated aging diseases. Environmental…
Hydra Foto
Hydra attached to a substrate