Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

muscle contraction

ability to make a muscle become shorter and thicker

lateral ptergoid

muscle that opens the mouth


number of bones in the body

lactic acid

waste product that builds up in the muscle after extensive exercise


rotates the head to one side if one muscle contracts and other muscles relax


closes the mouth (mandible)

humerus bone

in the pectorlis major's insertion

muscle fibers

strands of tissue that make up a muscle

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording