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Related Concept Videos

Aging01:26

Aging

Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
Mitochondria01:37

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
Replicative Cell Senescence02:15

Replicative Cell Senescence

Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
Replicative Cell Senescence02:15

Replicative Cell Senescence

Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
Evolutionary Psychology01:20

Evolutionary Psychology

Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the human psyche...

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Related Experiment Video

Updated: Jun 11, 2026

Surveying Low-Cost Methods to Measure Lifespan and Healthspan in Caenorhabditis elegans
10:08

Surveying Low-Cost Methods to Measure Lifespan and Healthspan in Caenorhabditis elegans

Published on: May 18, 2022

[Evolution conceptions about the nature of aging].

A A Moskalev

    Advances in Gerontology = Uspekhi Gerontologii
    |July 1, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Aging is an age-dependent fractal process involving increased homeostasis disturbances across multiple biological levels. This study explores the co-evolution of aging and anti-aging mechanisms, detailing various aging types.

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    Surveying Low-Cost Methods to Measure Lifespan and Healthspan in Caenorhabditis elegans
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    A Suppressor Screen for the Characterization of Genetic Links Regulating Chronological Lifespan in Saccharomyces cerevisiae

    Published on: September 17, 2020

    Area of Science:

    • Gerontology
    • Biophysics
    • Evolutionary Biology

    Context:

    • Aging is a complex biological process with multifactorial origins.
    • Homeostasis disturbances occur at various organizational levels, from molecular to systemic.
    • Evolutionary pressures have shaped both aging processes and counter-aging mechanisms.

    Purpose:

    • To present aging as an age-dependent fractal process.
    • To examine the simultaneous evolution of aging and anti-aging forms.
    • To delineate the evolutionary stages of distinct aging types.

    Summary:

    • This work defines aging as an age-dependent fractal process characterized by escalating homeostasis disturbances.
    • It considers evidence for the concurrent evolution of aging and anti-aging strategies.
    • The study outlines the evolutionary development of "molecular", "segregational", "conditional", "clonal", postmitotic, and systemic aging.

    Impact:

    • Provides a novel fractal framework for understanding aging.
    • Highlights the evolutionary interplay between aging and anti-aging.
    • Offers insights into the diverse manifestations and origins of aging across biological scales.