Controls heredity of the organis
the organ that controls your breathing is the lungs =)
A cell is a complete structure, it controls itself.
The answer is nucleus :)
The nucleus controls the information in a cell.
the drum machine
The person who controls a motor car is called the driver.
I think dialysis
The guy who works the controls on a videotape machine. (or in the new awesome tapeless world, the guy who controls the DVR.)
In a sewing machine it adjusts the length of the stitches
If it pertains to electrical controls on a machine then the safety device is called an emergency stop button.
the kernel
A person controlling a machine is called an 'Operator' think of it as Operating a machine, not controlling it.
The arbiter controls the chess game in tournaments.
The front person(The Pilot) operates all the controls and movements of the jet while the back person(The Missile Targeter) just controls and operates the full gunning and missile launching activities.
Political Machine
An OS is usually an Internal program that controls the machine it is in.