In our common view we see birth as some kind of beginning and death as the end, like some kind of cessation or disappearing, as if it was a straight line with a definite beginning and ending.
The Buddhist view however is circular. Birth is a new beginning, then we have being or existence, followed by death, which leads again to new creation, a new birth. So there is a connection between the end of something and a new arising, there is no break in between.
Any kind of phenomenon, all dual existence, is transitory, which implies that it is subject to change, to continuous change. But the change is never in a straight line, it is always attaining a circular movement.