What is the difference between a camshaft and a crankshaft?

The connecting rods and pistons are connected to the crankshaft. Ignition of the air/fuel mixture in the combustion chamber pushes the pistons down which rotates the crankshaft which generates the engines torque/power. The camshaft controls the opening and closing of the valves which allows the air/fuel mixture to flow in and out of the engine. The camshaft is driven by the crankshaft and is kept in proper sequence by a timing belt/chain or gears.