Question

Why do we need new body cells

Answer 1

You need new body cell because yourvv CB old body cella’s die and they must be replaced

Answer 2

When we are adults many cells mature and become specialised for their particular job in the body. So they don't make copies of themselves (reproduce) so often. But some cells, such as skin cells or blood cells are dividing al the time. When cells become damaged or die the body makes new cells to replace them.