No matter how fancy or simple, they all contain the same basic elements.
Aerator: Reduces the water's flow rate and curbs splashing.
Spout: Delivers water from the body to the sink.
Handle: Opens and closes the valve.
Valve Controls: the flow rate and water temperature.
Body: Blends hot and cold water headed for the spout.
Supply: lines Connect to the house's hot and cold water pipes.