Ageing
In short
Ageing is the biological process of becoming older through the accumulation of changes over time. It affects humans, animals, and fungi by altering their physical, psychological, and social states.
In plain words
As living things get older, their bodies and minds change. This can mean cells stop dividing or organs work differently. While most animals age, some simple creatures like certain bacteria can live almost forever.
A simple example
A person might notice their hair turning grey or their skin becoming less elastic as they grow older. These are visible signs of the biological ageing process.
Why it matters
Understanding ageing helps scientists develop medicines to treat age-related diseases. It also helps governments plan for societies with more elderly people.
Easy to mix up
Do not confuse biological ageing with chronological ageing, which is simply the number of years a person has lived.