The actual baking tin has three parts, the container, the axle that connects to the motor and the paddle. The total number of parts in the entire bread maker depends on make and model. All have a hinged lid and a body, both containing other parts.
The hinged lid has an inside lip to seal the baking tin and a steam exhaust port. The body contains the controls, the motor and the power cord. The paddle is installed in the tin, and the tin is pushed down on the axle screw at the base of the container.
The correct program is selected on the control panel. The paddle mixes the ingredients, and then the dough is left to rise in the warmed tin. After baking, the bread is coaxed out of the tin, usually with the paddle still inside the loaf.