Advertisement Upgrade to remove ads


carry blood without oxygen toward the heart (except one)


carry blood with oxygen away from the heard (except one)

deoxygenated blood

blood that has little to no oxygen


the branches that carry air from the trachea to the lungs

excretory system

the system that eliminates solid wastes; the urinary system is part of this system

red blood cells

these cells carry oxygen to the other cells in the body (no nucleus)


structures inside theheart and blood vessels that keep blood from flowing backwards

atria (1-atrium)

the two smaller upper chambers of the heart

ventricles (2)

the larger lower chambers of the heart

white blood cells

these blood cells change shape as they do their job and protect your body from germs


the smallest blood vessels that contain both carbon dioxide and oxygen


the tube structure between the larynx and the bronchi (windpipe)


an organ that contains RBC, WBC, platelets, and plasma; part of the circulatory system


this tube-like structure is between the trachea and esophagus and is responsible for your voice


this structure covers the trachea when you swallow so food does not "go down the wrong pipe"


the tiny sac-like structures int he lungs where the gases (carbon dioxide and oxygen) are exchanged; rhymes with ravioli


the sticky fluid that traps dust, germs, andother particles in the air to protect the respiratory system

digestive system

responsible for breaking down food into nutrients so that the cells can use them

circulatory system

responsible for transporting nutrients, wastes, oxygen and carbon dioxide to and from all cells

respiratory system

responsible for taking in oxygen through the nose and mouth to the trachea to the lungs for use and then removing carbon dioxide; cleans the air you breathe.

urinary system

responsible for getting rid of liquid wastes from the blood


ringed muscular tube that carries food from the mouth to the stomach


hair-like structures that are found in the lungs and trachea to sweep away dirt


these structures are found in the small intestine to increase the surface area for digestion


blood cells that form clots so one doesn't bleed to death


the largest part of blood that carries food from the digestive system to cells and carries away wastes


cardio means heart; vascular means vessels; another term for the circulatory system

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