Definition
The vocal tract is a term used to refer to the section of a human’s body that is manipulated in order to produce speech sounds, including the larynx, lungs, and mouth. The vocal tract can be separated into two subsystems: the supra-laryngeal vocal tract and the subglottal vocal tract. Both subsystems are discussed further in their respective page.
Below is a diagram of the whole vocal tract.
INLP Linguistic Glossary 