The Valve is the piece that actually moves in and out, or "opens and closes" - the part of the block that the valve rests on is called the valve seat.
Under the valve cover where the valve springs are.
Valves in the cylinder block allow air & fuel to enter each cylinder - and enable exhaust gasses to exit the cylinder.
proportioning valve
A valve guide keeps the valve straight. Valve keepers keep the valve secured.
The opening of the coronary sinus is guarded by a flap of tissue called the Thebesian valve. This valve helps prevent backflow of blood from the right atrium into the coronary sinus.
Could be another name for the four stroke cylinder head, which contains the inlet / exhaust valves.
The cylinder head, which in overhead cam engines houses the camshaft that operates the inlet and exhaust valves and in side-valve engines houses the rocker arms that do the same thing- both via compression of tappets that link to the valve. Below the cylinder block is the crankshaft housing, or 'crankcase' in American terminology, which houses the crankshaft that co-ordinates and drives the pistons operating within the block.
Opening the oxygen cylinder valve all the way ensures a proper flow of oxygen and prevents the valve from getting stuck due to pressure. It also allows for accurate regulation of the oxygen delivery rate.
The cylinder head is a smaller block that (generally) sits on the top of the crankcase. It is the part of the engine where air is received and mixed with fuel, then passed into the block for the intake/compression/combustion cycle and then directs it out on the exhaust cycle. On OHC/OHV (OverHead Cam/OverHead Valve) engines, the cylinder head contains, at least, - with many more possibilities - the intake and exhaust valves (one or more of each per cylinder), the camshaft(s), either a belt or chain for timing the cams and valves to the movement of the pistons, fuel injectors (if present), and various types of apparatus to operate the opening and closing of the valves including mechanical or hydraulic systems for valve movement and sensors such as a MAF (Mass Air Flow), PCV (Portioning Control Valve), and/or EGR (Exhaust Gas Recirculation) valve. The head gasket is the gasket that goes between the cylinder head and the crankcase or block of the engine.
back of engine just left of the engine block. It is a little silver cylinder.
This is the "right atrioventricular canal" whose opening contains the right AV valve, also known as the tricuspid valve.
Valve cover gasket holds oil from the valves from leaking off the top of the head . Head gasket is lower and holds cylinder pressure between the cylinder head and the engine block.