What is it that you contain? The dead. Time.
Light patterns of millennia opening in your gut.
Every minute, in each of you, a few million potassium atoms succumb to radioactive decay. The energy that powers these tiny atomic events has been locked inside potassium atoms ever since a star-sized bomb exploded nothing into being.
Potassium, like uranium and radium, is a long-lived radioactive nuclear waste of the supernova bang that accounts for you.
Your first parent was a star.