Advertisement Upgrade to remove ads


the bodily process of inhalation and exhalation


a thick, slippery substance produced by the body


short structures projecting from a cell and containing bundles of microtubules that move a cell through its surroundings or move fluid over the cell's surface




a cartilaginous structure at the top of the trachea


membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi


two short branches located at the lower end of the trachea that carry air into the lungs.


two spongy organs, located in the thoracic cavity enclosed by the diaphragm and rib cage, responsible for respiration


tiny sacs of lung tissue specialized for the movement of gases between air and blood


The partition of muscles and membranes that separates the chest and abdominal cavities

vocal cords

folds of tissue within larynx that vibrate and produce sounds

Flickr Creative Commons Images

Some images used in this set are licensed under the Creative Commons through Click to see the original works with their full license.

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 above 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

NEW! Voice Recording