<p>Aging means the process of becoming older. Usually age of&nbsp;individual&nbsp;can be counted from the time when it was born, and it is called real-time aging. Meanwhile, biological aging, as known as senescence, means the steady&nbsp;deterioration&nbsp;of &nbsp;cell characteristics&nbsp;that could function&nbsp;for continuing&nbsp;life activity.&nbsp;During the biological aging,&nbsp;cells&#39; ability to maintain viability&nbsp;declines while tendency to be vulnerable to mortality&nbsp;grows.&nbsp;(Processing)</p>