The world is a beautiful place it has everything one can wish for. It provides us with all needs that are useful to sustain and carry out life. Everything and everyone in this world has their time nothing last forever. Birth and Death are the natural truth of this world.
Every living thing on this world has its life span human beings live up to approx. 75-85 years and in animals the scenario is different because different animal have different life span. This is Now You Know and in this video we will be talking about why this happens.
For small microorganism life is just for few weeks while Tortoise can live up to more than 100 years, rats and mice have a life span of 4 years while Bow head whale lived almost 200 years.
Most of the living organism degenerates after reaching sexual maturity. There are several factors causing process and they are quite complicated too.
Ageing is a result of cell death and dysfunction, when we are young we continously regenerate cells in order to remove the dead ones. But as we grow old this process slows down resulting in declining health and finally death.
Different animals live in different types of environment and body size. Their body adapts to live in these conditions. In cold environment heart beat and metabolic rate slows down and this slows the ageing process.
Smaller animals like flies and worms are limited by their cell division; their cells cannot divide and are unable to replace the old ones. So their bodies give up more quickly.
Each organism has their different ways to react to threat and that makes the difference in most of the cases. It's the difference between the factors like environment, size and cell generation that decides the age of a living being.
But what would happen if they never aged? Well this is a topic of another now you know.