Site of gas exchange in the lungs
Movement of gases from high concentration to low concentration
Another name for the trachea
Prevents food from entering the trachea
Oxygen-carrying molecule in red blood cells
Air which is breathed out
Air moves from the lungs and into these vessels
Carries water and nutrients around the body
The muscle that pumps blood all around the body
Vessels that carry blood back to the heart
Vessels that carry blood away from the heart
Please allow access to your computer’s microphone to use Voice Recording.
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.
Your microphone is muted
For help fixing this issue, see this FAQ.
NEW! Voice Recording
Click the mic to start.