Biological immortality

（重定向自Immortalized cells）

Polycelis felina, a freshwater planarian

Biological immortality refers to a stable or decreasing rate of mortality from senescence, thus decoupling it from chronological age. Various unicellular and multicellular species, including some vertebrates, achieve this state either throughout their existence or after living long enough. A biologically immortal living being can still die from means other than senescence, such as through injury or disease.

单词	Immortalized cells
释义	Immortalized cells 英语百科 Biological immortality （重定向自Immortalized cells） Biological immortality refers to a stable or decreasing rate of mortality from senescence, thus decoupling it from chronological age. Various unicellular and multicellular species, including some vertebrates, achieve this state either throughout their existence or after living long enough. A biologically immortal living being can still die from means other than senescence, such as through injury or disease.
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