Have you ever wondered how to get your mouth to make the sound you are attempting to learn in a new language. The figures below show how you mouth and vocal tract produce sounds. The touch, lips, teeth, control the air pass through the mouth to produce certain sounds. The images below show the main parts of the mouth and where each vowel sound is produced. See this article for more information about how sounds are produced. See an audio IPA chart.
This interactive diagram is from Phonetics: The Sounds of Spoken Language