When you look at a clock You see numbers, lines, and hands. Not the kind of hands you're thinking about, Just long thin lines, no fingers, no feeling.
But when you take it apart and look inside of it, You see a very complicated thing Grears, springs, and wires.
Vagly resembeling the insides of us, A complicated inside. Full of water and blood and guts
In the core is a heart or a spring if you a clock. That keeps us moving, pumping blood to all the far corners of our bodies. Or moving the gears that move the hand that make time go bye.
This is how a body functions, or a clock, or what every you want to make this metaphore represent.