In its physical aspect, singing has a well-defined technique that depends on the use of the lungs, which act as an air supply or bellows; on the larynx, which acts as a reed or vibrator; on the chest, head cavities and skeleton, which have the function of an amplifier, as the tube in a wind instrument; and on the tongue, which together with the palate, teeth, and lips articulate and impose consonants and vowels on the amplified sound.