Rocker arms, in conjunction with the camshafts, do so. The camshaft has an egg pattern on it, and this pushes the rocker arms up and down. The rocker arms are connected to the valves, and this puts the fuel/air mixture into the engine, then takes it out again
Hinge ligaments
muscles :)
The opening, the body fo the interview and the closing
push rods connected to the camshaft
the adavctor muscle
The opposite of opening would be closing or shutting.
The adductor muscles control the opening and closing of the clam valves. When these muscles contract, the valves close, and when they relax, the valves open. Clams use this mechanism to protect themselves from predators and regulate their internal environment.
by opening their mouths then closing it then opening it again, then closing it:-)
The valve in a sink faucet controls the flow of water by opening and closing to regulate the water pressure and temperature.
opening is 1500 n closing is 4889
governor senses the speed of spindle of engine and controls the mechanism of opening and closing of throttle valve
The opening of the Berlin Wall signified the closing of the Cold War.