Question

Will a human being have the same set of cells that he or she is born with when he or she is old

Answer 1

They die over time but new ones take its place...

For Example: Pretend that your sick and your cells are soilders. They would call in reinforcements and rick their lives to keep you healthy. They die once the battle is over. I call it the "Virus".

Some cells self destruct to save energy in your body. When you sneeze your technically desposing the self destructed cell. The cell that self destructed in your body turns into wet..powder.....that's what it looks like atleast.

I hope this helped :P

Answer 2

No. Cells die by the THOUSANDS every day, but are replaced with new ones.