Lifespan
Lifespan
Lifespan (pronounced: /ˈlaɪfspæn/) is a term used in the field of biology and medicine to denote the maximum or average length of life of an organism or a particular species. The term is most often used in the context of human beings, but it can also apply to animals, plants, and other living organisms.
Etymology
The term "lifespan" is derived from the English words "life" and "span". "Life" comes from the Old English "lif", which means "existence" or "way of life", while "span" comes from the Old English "spanne", which means "distance" or "period of time". Together, they signify the duration of an organism's existence.
Related Terms
- Life Expectancy: An estimate of the average number of years a person is expected to live, based on current age and demographic factors such as gender.
- Longevity: Refers to the length of life, often used in the context of members of a species known for living exceptionally long lives.
- Mortality Rate: A measure of the number of deaths in a given population, scaled to the size of that population, per unit of time.
- Senescence: The condition or process of deterioration with age. Loss of a cell's power of division and growth.
- Aging: The process of becoming older, a process that is genetically determined and environmentally modulated.
See Also
External links
- Medical encyclopedia article on Lifespan
- Wikipedia's article - Lifespan
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