Check out this tremendously interesting x-ray image made for speech research by Christine Ericsdotter:
Christine Ericsdotter says “bÃ¥de” (“both”). The sequence is an excerpt from a 20 second X-Ray film registred at the Danderyd Hospital in Stockholm in March 1997.
And a couple more:
Female subject exploring her jaw path
Male Swedish subject saying “pion” (“peony”).
I would love to see more images like these — wow, the human body amazes me!